I noticed that r./o. water p.h. is level to start with and once added g/h part 3 it was stable?? does r.o. water stay stable or do you still need to keep a good hard eye on it as with tap water or is it more forgiven??

Jamie

It's the plants that up take some nutrients and deposit back other's that is causing your Ph to change all the time. It's not the end of the world, you just check it twice a day. You can increase the size of your res but the problem with that is you really should change the nutrients every 7-10 day's to keep them fresh and in the proper amounts of NPK for the cycle of life the plant is in at that time.

__________________
Peace
Zandor

If you go cheap you grow cheap. - Me