White Widow x Big Bud seeds Indoor growing tent 48"x24"x60" Hydroponic Rockwool surrounded by hydrotron Hydro bubbler system, 8 gallon tote with 5 gallons of water, leaving about an inch of exposed roots from bottom of 3" pots Tap water source Source water pH - 6.9 (treated down to 6.2, I just dropped to 5.6 tonight) Source water EC - 110ppm (I don't have a EC meter) 5 weeks old Using complete FoxFarms system and schedule Currently in week five my ppm is target for 1100-1260 - it is currently 1275 Lighting source and distance from plant - CFLs six 5000k total of 8100 lumens + supplemental 225 LED lammp in the back; has been right at the top of the plants but I just moved up to 4" above; started with three CFLs doing 3300 lumens Air temperature - at plant level I try to keep it between 68-75 Reservoir temperature - 65 Air % Relative humidity - 35% Lighting schedule - 18/6 Type of ventilation your room has - so far single fan sucking fresh air into tent Did you pre-soak your media in pH corrected solution? Yes Sorry for my first post to be a cry for help but I am loser n00b first-time grower and my girls are not getting any better. Please see pics. Since the girls were a few weeks old the lower leaves have been turning yellow/brown on the tips and spots, eventually covering the entire ends as the leaves dry up and curl. The bigger the fan leaf, the quicker the problem shows up Massive amount of online research has led to more conflicting advice than I can work-out. The plants have been flushed twice so far and while it helps their growth, it does not cure the problem. They love Grow Big and Tiger Bloosm and can grow over an inch in a day after adding food. The first three weeks I was accidentally using Grow Big for soil and wondered if that was the problem and I switched to Hydro Grow Big - no change. I have read several places that it does not matter, but have stuck with the hydro nutes. I read to cut off bad leaves to help prevent them from sucking away good nutes, but now I am worried as the bigger plant is so thin at the bottom. One plant is 18" tall, thin with ok roots. The other is 13" tall, stunted, fuller and with great looking roots. I have tried more nutes, less nutes and everything else I have read about - so much conflicting advice - too much nutes, too little ... ugh Pics are of my set-up, a close-up of leaf problem, close-up of tall plant's lower section, and the pile of leaves I have clipped off over the weeks. I don't want to cut anymore big fan leaves! Thanks for any suggestions!