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Thread: DWC Water Temp Problems

  1. #1
    dhmessiah is offline Registered
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    DWC Water Temp Problems

    Hey guys, since ive gotten so much great feedback from the other two threads i have posted, I thought i would ask you guys another question.

    I'm runnin a DWC setup and have been having problems with root rot due to my water temps bein about 82 deg farenheit. My question to you gurus is what is a good way to keep the temps down? The space i have the ladies in is in the air conditioned house, but all the lights seem to be heatin up the water temp. The room temp is about 72-75 deg farenheit. I have good ventilation in the room thx to a 6 inch fan exhausting into the recirc vent of the house. So how the hell should i cool my water down?
    Thx in advance dudes!

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    helpinOG is offline Registered
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    Quote Originally Posted by dhmessiah View Post
    Hey guys, since ive gotten so much great feedback from the other two threads i have posted, I thought i would ask you guys another question.

    I'm runnin a DWC setup and have been having problems with root rot due to my water temps bein about 82 deg farenheit. My question to you gurus is what is a good way to keep the temps down? The space i have the ladies in is in the air conditioned house, but all the lights seem to be heatin up the water temp. The room temp is about 72-75 deg farenheit. I have good ventilation in the room thx to a 6 inch fan exhausting into the recirc vent of the house. So how the hell should i cool my water down?
    Thx in advance dudes!

    I'll start with u, and try to help somebody every day, we need more growers!

    how the heck is you're room temp that low and you're water temp that high? What do you have in the water creating so much heat? 68-70 water temp is ideal, I've grown tree's with DWC before, and everything ive read is 71+ will create root rot, oxygen levels are a lot lower with the higher temps.

    Buy a water cooler off craigslist, the $20-50 used ones, the kind you see in doctors offices. Rip the coil out and modify it to work with you're DWC. Theres how-to's if you search the net....just a cheap alternative to buying a $300-500 chiller, or using water bottles which will do the trick until you forget once and loose it all.

    Next, if you're using non air cooled HID's those temps may be fine, leaf temp is going to be higher than room temp, 78-80 is perfect leaf temp as I call it. The stomata's will start to close and stay somewhat closed under 78 deg's, and that will slow growth down. Keep humidity at least at 50% veg and 40-50 for flower. Drain the water from the DWC if you need to adjust ph, don't adjust it with the plants in there...and let it drift a little to. That should get you started.

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    tinytoon's Avatar
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    ok first off root rot begins 80+ not 71+. How big is the container you are doing grow in?? Depending on container size you could take empty soda bottles (16oz, 20oz, 2l) fill with water then freeze. Place frozen bottle in rez and temps go down. Have about 4-6 bottles made up and in freezer that way when one is thawed just pop it back into freezer and grab another. If container that plants are in is a dark color then paint white to reflect some heat off container.
    If you have something productive to say by all means speak up, if not then please close the hole under your nose.
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    helpinOG is offline Registered
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    Quote Originally Posted by tinytoon View Post
    ok first off root rot begins 80+ not 71+. How big is the container you are doing grow in?? Depending on container size you could take empty soda bottles (16oz, 20oz, 2l) fill with water then freeze. Place frozen bottle in rez and temps go down. Have about 4-6 bottles made up and in freezer that way when one is thawed just pop it back into freezer and grab another. If container that plants are in is a dark color then paint white to reflect some heat off container.
    Hey tinytoon, thats exactly what I was trying to tell him not to do, its da hillbilly way, as soon as you need to do something in you're boring life, such as leave da house, da plants die. I've seen root rot at 74deg's with a 70lpm air pump, 68-70 is where ya want it, trust me. Don't make me site sources dammit.


    Another thing about da hillbilly way, frozen ice bottles get all kindsa cozy with the roots, the roots might be in a cool good solution now, but any roots touching the bottles will most likely eat shit from getting too cold thanks to a 32deg ice bottle.

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    ive had three grows all exclusively with DWC and im just gonna throw in my two cents. A lot of people opt for black buckets so that no light can penetrate but they are more likely heating their water unintentionally by doing so.

    get a COMPLETELY opaque bucket. try to go with lighter colors with the most white as it will reflect heat BETTER. a bucket with a white top and black sides you will still be raising temps. also a tiny hole for gas exhaustion so that youre not throwing a lid on a boiling pot.

    i stuck a 2$ film thermometer for a fish tank on the outside of my bubbbler to watch the water temps and i never got over room temp by more than 2 degrees F( 72.)
    "Anyone who has never made a mistake has never tried anything new." -Albert Einstein

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    well sometimes the "hillbilly way" is the only affordable way to try and accomplish something and with the way money is these days not to many peeps have a roll of extra cash in their sock. As for the roots being toast if they touch the bottle, use a lil time and create a screen or something that will keep roots off bottle but not restrict water flow. Light colored buckets is the first and easiest step which I mentioned in my first post. If these thoughts dont sound like they will work then the sure fired way to fix the problem is to completely seal room and install an A/C unit just for that room but hell I dont carry an extra $200 around but if you do go for it
    I also have DWC running here and my temps in buckets runs right about 76 and never have had a problem with root rot.

    Just my thoughts have a nice day
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    Thanks for the suggestions guys. I too am puzzled why the water temp is so much higher than room temp. My buckets are white, and unfortunately too small to fit any kind of frozen bottle. I wish i did have the dough for an ac unit, but im unemployed at the moment and have very little cash to throw around. Im gonna try drilling a small hole in the side of the buckets and see if that helps.

    Hey OG, you mind postin that link to the site that shows how to modify a water cooler, i cant find sh!t on it.

    Thanks Again!!!

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    Quote Originally Posted by tinytoon View Post
    well sometimes the "hillbilly way" is the only affordable way to try and accomplish something and with the way money is these days not to many peeps have a roll of extra cash in their sock. As for the roots being toast if they touch the bottle, use a lil time and create a screen or something that will keep roots off bottle but not restrict water flow. Light colored buckets is the first and easiest step which I mentioned in my first post. If these thoughts dont sound like they will work then the sure fired way to fix the problem is to completely seal room and install an A/C unit just for that room but hell I dont carry an extra $200 around but if you do go for it
    I also have DWC running here and my temps in buckets runs right about 76 and never have had a problem with root rot.

    Just my thoughts have a nice day
    Lawl. $200? Try a thousand or more. A split unit a/c is $450+ for the cheapos and a good window unit cost about the same. Not to mention that wouldn't fix the problem at all. The whole point of sealing the room is to create a co2 enriched, HIGH temperature grow room. It would be hell on you're dwc as the room temps would most likely be 83deg's+, and a good co2 controller is $500, plus the co2 tank and regulator. I'm probably forgetting a bunch of other things, oh well, you get the point. And by the way, mid 70's on rez temps is just asking for problems.

    http://www.guarriello.net/chiller.htm
    DIY Water Cooled light Chiller/rez > $300.00 - 420 Magazine


    Dopest's "Cooler" DIY Chiller - International Cannagraphic Magazine Forums
    And heres a thread on the cheap 5 gallon 1/12 hp chiller drops 100gal's 10 deg's and 30 gallons 30 deg's.

    I would suggest putting the coil in a seperate resovior, $30-$40 10' titanium tubing, and pump the nutes through it, this way the coil won't corode and you can place the compressor and everything else outside the grow. I'm in the process of making a 11,000btu chiller from a old floor unit a/c.

    P.s. The real hillbilly water chiller involves a regular cooler with two holes in it, for a hose to come in and out. Ice bottles in the cooler along with 20-30ft of tubing inside. Input and output plumbs into the controller bucket/rez/buckets. pump size not that important, if you end up with too much cooling power just poke some holes in the input hose near the pump. Once you get the temps under 70deg's you're girls will be a lot happier.

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    Well it looks like to make any of those options work, i'm gonna have to recirculate my water. I did drill some exhaust holes in the side of the buckets and cranked my a/c down to 69 deg. My temps are now down to 72-73 deg. I treated the roots with h202 and all is lookin good for now. Thx again guys! Here's a couple of pics of the ladies.
    Attached Thumbnails Attached Thumbnails DWC Water Temp Problems-img_2454.jpg   DWC Water Temp Problems-img_2457.jpg   DWC Water Temp Problems-img_2458.jpg  

    DWC Water Temp Problems-img_2459.jpg  

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    Stop using H202. It is NOT a good oxidizer (unless at pH of 2.0 which is not advisable for good plant health) and is NOT killing the pathogen organisms that are alive and thriving in your DWC system(s) and thus killing your root systems (and your plants). H202 also strips nutrients out of solution (forming unusable precipitates).

    Pulled this from a blog by a big west coast hydro shop. I've never liked using h202 on plants. You're girls are lookin good though. Keep it up!

    edit: that room temp is too low and you're res temps still just a bit too high.
    Last edited by helpinOG; Aug-03-2010 at 17:11.

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    wow in the 2 years I have been learning and helping others on this site I dont think I have ever had anyone contridict everything I have to say and the worst part is most of what I say I learned from some of the top growers on here. /shrug

    DH there is always more than 1 way to do things. There is no such thing as exactly right or wrong. I have used h202 in the past along with quite a few peeps on here with no ill effects but honestly about the only thing that is being done is your cleaning the nute stain off the roots. If you are fearing rot then there are quite a few products on the shelf. I was turned onto Hygrozime for that type of problem. Yes the close to perfect temp would be 68 degrees as this is the temp where water will pickup the most oxygen, atleast in my book it is. Plants look real good and your doing real good job fighting that heat problem. Keep it up
    If you have something productive to say by all means speak up, if not then please close the hole under your nose.
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    Quote Originally Posted by tinytoon View Post
    wow in the 2 years I have been learning and helping others on this site I dont think I have ever had anyone contridict everything I have to say and the worst part is most of what I say I learned from some of the top growers on here. /shrug
    Well, I guess thats one way to argue if all else fails. HAHA So the top growers on here use ice bottles and sealed rooms w/o co2 enrichment as well huh? I always thought they used quality equipment but maybe you can get by with a hd fan and a $10 ph meter, what do I know. Btw, you have some nice plants, the strain is commercial high yielder, might as well be big bud. Suppose to be a HUGE producer though, and the black markets payin good for just about any dro' I stick with mostly connoisseur strains myself, co2 enriched closed grow enviroment makes it all worth while.

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    Thx for the positive comments guys. I'm not keeping the h202 in the reservoirs, just srpayin down the roots then flushin them with water. The strain is LA Confidential, i didn't know that was considered high yield. I also have Sour Diesel and Chemo in veg right now.:
    Last edited by dhmessiah; Aug-03-2010 at 23:50.

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    Quote Originally Posted by dhmessiah View Post
    Thx for the positive comments guys. I'm not keeping the h202 in the reservoirs, just srpayin down the roots then flushin them with water. The strain is LA Confidential, i didn't know that was considered high yield. I also have Sour Diesel and Chemo in veg right now.:

    Hells yeah, I just sprouted a la conf freebie and a few others, think its la woman and rocklock, oh and sour cream. DNA genetics. P.s. I was talkin to tiny and his medibud strain, I see that comerch runnin around Colorado.

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    I'm not going to screw someone's thread by bitching, I just try and help.

    Sorry DH for this BS to end up in your thread
    If you have something productive to say by all means speak up, if not then please close the hole under your nose.
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    LOC NAR on probation is offline Registered+
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    Quote Originally Posted by helpinOG View Post
    Well, I guess thats one way to argue if all else fails. HAHA So the top growers on here use ice bottles and sealed rooms w/o co2 enrichment as well huh? I always thought they used quality equipment but maybe you can get by with a hd fan and a $10 ph meter, what do I know. Btw, you have some nice plants, the strain is commercial high yielder, might as well be big bud. Suppose to be a HUGE producer though, and the black markets payin good for just about any dro' I stick with mostly connoisseur strains myself, co2 enriched closed grow enviroment makes it all worth while.
    C02 is highly over rated. And yes if getto is the only way you can go then use the ice bottles. I have and no frozen roots. We move on. Closed room no co2 but important to have fresh air pumped through regular or a co2 generator to keep the levels good.

    Work with what you have. Sorry to hijack but we can take this to another thread. Not angry here just more than one way to skin a cat.

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    I aint stressin. There is always a difference of opinion on these forums. And yes there definately is more than one way to do things.

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    Sorry DH for my BS to end up in your thread
    Tiny, I fixed your quote, enjoy.



    Quote Originally Posted by LOC NAR on probation View Post
    C02 is highly over rated. And yes if getto is the only way you can go then use the ice bottles. I have and no frozen roots. We move on. Closed room no co2 but important to have fresh air pumped through regular or a co2 generator to keep the levels good.

    Work with what you have. Sorry to hijack but we can take this to another thread. Not angry here just more than one way to skin a cat.

    orly? Is it the higher yields? density??? odor control? which benefits over rated? Don't get me wrong here, I like hydro, but it just dont taste as good, if I were running comerch strains I wouldn't even worry about a state of the art sealed room or running mostly organic soil. But i'm interested in good yields from high thc and cbd strains that are not noted for their yield unlike you guessed it, hahaha medibud! Man that guy is just sorry, he'd be big pimpin if he had $200 for that a/c hes talkin bout.

    Then Tiny could take you're advice and run a closed room with no co2 enrichment, and just pump some air in there. lmao do you have any idea how shitty the circulation fans would perform with you pumping air into a closed room or even one with a exhaust vent? It's called static pressure my friend. Pull not push or pump. A generator won't keep the levels good either, it will just pump co2 in there, however a co2 sensor hooked up to either a generator or regulator/tank/fuzzy logic mode WILL control it.

    Closed room no co2 but important to have fresh air pumped through regular or a co2 generator to keep the levels good.
    Man I'm sorry but this hardly makes any sense at all, closed grow room with no co2 but fresh air "pumped lol" in, you must be talking about a conventional grow room with ventilation, one with a front door, that is apparently closed.

    DH, thanks for bein a good sport. Anytime you need help bra', lemme know!

  19. #19
    khyberkitsune is offline Banned
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    Personally I've not had problems even outdoors in hot Cali sun with water temps past 90 degrees as long as the reservoir is large enough, has a TON of oxygen being pumped through it, and has great circulation so it doesn't go stangant.

    Also, that added motion helps with the cooling process. Convection helps a tiny bit.

    If you really want it cool, get a Peltier cooling module, fix a thin heatsink and fan to it, pop it on the side of your reservoir, hook up power. This should help immensely. For a small 5 gallon reservoir, you'll only need a 60 watt one to help bring that temp down.

    The majority of root rot is caused by a lack of oxygen and circulation. Pathogens that cause this thrive in poor reservoir conditions, even at room temperature.
    Last edited by khyberkitsune; Aug-05-2010 at 03:45. Reason: spelling

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    LOC NAR on probation is offline Registered+
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    Quote Originally Posted by helpinOG View Post
    Tiny, I fixed your quote, enjoy.






    orly? Is it the higher yields? density??? odor control? which benefits over rated? Don't get me wrong here, I like hydro, but it just dont taste as good, if I were running comerch strains I wouldn't even worry about a state of the art sealed room or running mostly organic soil. But i'm interested in good yields from high thc and cbd strains that are not noted for their yield unlike you guessed it, hahaha medibud! Man that guy is just sorry, he'd be big pimpin if he had $200 for that a/c hes talkin bout.

    Then Tiny could take you're advice and run a closed room with no co2 enrichment, and just pump some air in there. lmao do you have any idea how shitty the circulation fans would perform with you pumping air into a closed room or even one with a exhaust vent? It's called static pressure my friend. Pull not push or pump. A generator won't keep the levels good either, it will just pump co2 in there, however a co2 sensor hooked up to either a generator or regulator/tank/fuzzy logic mode WILL control it.



    Man I'm sorry but this hardly makes any sense at all, closed grow room with no co2 but fresh air "pumped lol" in, you must be talking about a conventional grow room with ventilation, one with a front door, that is apparently closed.

    DH, thanks for bein a good sport. Anytime you need help bra', lemme know!
    Hey TROLL buddy you really don't have a clue do ya ?
    So your grow room doesn't have a front door to keep closed ?

    Look I love you brother or brother in law. You the man cause you can prove it right ?
    Where's your grow log ? Where's your pic's ?

    Don't talk about it, SHOW IT.

    Or are you just my fucktard brother running his mouth ?

    REPLY !

  21. #21
    helpinOG is offline Registered
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    Quote Originally Posted by LOC NAR on probation View Post
    Hey TROLL buddy you really don't have a clue do ya ?
    So your grow room doesn't have a front door to keep closed ?

    Look I love you brother or brother in law. You the man cause you can prove it right ?
    Where's your grow log ? Where's your pic's ?

    Don't talk about it, SHOW IT.

    Or are you just my fucktard brother running his mouth ?

    REPLY !
    Wow you're cocksucker is rather large.

    Lets see if I can disect you're mildly retarded post.

    So your grow room doesn't have a front door to keep closed ?
    Yeah fo sho nigra, and it seals well I might add. The misunderstanding lies with this quote:

    Closed room no co2 but important to have fresh air pumped through regular or a co2 generator to keep the levels good.
    A closed room is not a ventilated room, its a closed room and ofcourse it has co2 whether its enriched or not, closed or ventilated. Ya know, you really are as dumb as a box of rocks. And I already touched on a generator not regulating the co2 levels. And in closing, I don't have shit to prove to anyone pal. I'll keep helpin people and you can keep giving them hillbilly advice with you're water bottles and superior knowledge on grow enviroments

  22. #22
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    Quote Originally Posted by helpinOG View Post
    Wow you're cocksucker is rather large.

    Lets see if I can disect you're mildly retarded post.



    Yeah fo sho nigra, and it seals well I might add. The misunderstanding lies with this quote:



    A closed room is not a ventilated room, its a closed room and ofcourse it has co2 whether its enriched or not, closed or ventilated. Ya know, you really are as dumb as a box of rocks. And I already touched on a generator not regulating the co2 levels. And in closing, I don't have shit to prove to anyone pal. I'll keep helpin people and you can keep giving them hillbilly advice with you're water bottles and superior knowledge on grow enviroments
    Your right you don't have anything to prove anything because really who the hell are we?? Your just acting like an ASS towards people (like Tiny) that actually take some time out of their day to post pics and info that help others. Just because his methods aren't the same as your don't cry about it. I don't know if you just woke up on the wrong side of the bed or something but take a chill pill.

  23. #23
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    Ok enough with the crap .......... On with the Grow!!!!
    If you have something productive to say by all means speak up, if not then please close the hole under your nose.
    Grow in Progress - Forced into retirement, advise only. ........................................ maybe
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  24. #24
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    Quote Originally Posted by helpinOG View Post
    Wow you're cocksucker is rather large.

    Lets see if I can disect you're mildly retarded post.



    Yeah fo sho nigra, and it seals well I might add. The misunderstanding lies with this quote:



    A closed room is not a ventilated room, its a closed room and ofcourse it has co2 whether its enriched or not, closed or ventilated. Ya know, you really are as dumb as a box of rocks. And I already touched on a generator not regulating the co2 levels. And in closing, I don't have shit to prove to anyone pal. I'll keep helpin people and you can keep giving them hillbilly advice with you're water bottles and superior knowledge on grow enviroments
    That's what I thought. You maybe my fucktard nephew that busted me right.

    Say fucktard. Where did you come from and WHY? and why not just go back ?

    No Proof. That's what I thought too.

    Just some punk TROLL running around stirring it up.

    Put up or shut up TROLL.

  25. #25
    khyberkitsune is offline Banned
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    Quote Originally Posted by helpinOG View Post
    Stop using H202. It is NOT a good oxidizer (unless at pH of 2.0 which is not advisable for good plant health) and is NOT killing the pathogen organisms that are alive and thriving in your DWC system(s) and thus killing your root systems (and your plants). H202 also strips nutrients out of solution (forming unusable precipitates).

    Pulled this from a blog by a big west coast hydro shop. I've never liked using h202 on plants. You're girls are lookin good though. Keep it up!

    edit: that room temp is too low and you're res temps still just a bit too high.
    Excuse me, H2O2 is a great oxidizer, that's why we use it for stripping off organic gunk from surfaces and for cleaning our mouths. And when it breaks down, it releases hydrogen and oxygen ions, which kill pathogens.

    Your chemistry knowledge is wanting.

    Oh, you got it from a *BLOG* and not a scientifically-vetted journal.

    If you think a BLOG is a trustworthy source (when in all chances it's just a thinly-veiled ADVERTISEMENT for some other product they're trying to sell,) then you're going to run into so many problems in the future as you start taking nonsense as fact.

    Unless that blog gave scientifically validated sources, you just got lied to, and lied to hard.

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