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What would you guys say the perfect PH is for my baby plants in week 1? 5.7 - 5.9 Also, what would you say the perfect reservoir water temperature is? right now its 72f 67-68f

Might be too much water/food. I had a similar problem with some Woody Kush. Leaves were sustaining damage similar to yours. Read about my problem and what fixed it here: https://www.rollitup.org/marijuana-plant-problems/547985-overfeed-underfeed-fan-leaf-problems.html If you're using a rockwool...

Problem fixed! :bigjoint: Too much food. Too high PPM's and too frequent flood cycles. Dropped the PPM's to less than 1400 and only three floods per light cycle, instead of six. Girls are much more happy now. Growth rates back to normal, stretching what seems like inches per day! Damn, they...

Yes, the rockwool works very well. I start clones in 1" blocks then transplant them to 3" blocks once they've sprouted good roots. I condition the rock wool by soaking it for 24-48 hours in a mild nutrient solution (see chart below) before putting in the cutting or transplanting to the 3" cube...

I've had lots of luck with House & Garden based program. I also add Nitrogen Boost and Dutch Master Zone. Nitrogen Boost really helps growth and vigor in veg but must be used sparingly, as directed on the H&G online nutrient calculator - http://www.house-garden.us/nutrient-calculator/. The Zone...

Well, all that fuss and the answer was staring me in the face the whole time. I was watering too often. Not a deficiency, not nute burn, just too much time with the roots under water. I was feeding six times in an 18 hour period. When you figure that the Ebb-N-Flo takes a few minutes to fill up...

Reduced frequency of feeding, thinking that I may be simply "watering them too much", and they seem to be responding. Went from 5 feedings per cycle to 3. Problem appears to be reducing. Only those leaves that were already a bit damaged are continuing to deteriorate while the new growth looks...

Problem continues ... dammit. More pics below. Come on guys, can ANYONE help? Surely someone has seen something like this before in their Ebb-n-Flow system. Or their DWC type system. I hate to battle this all the way through the run, may just nuke the whole damn room and start over with another...

Went through the garden yesterday and trimmed the dead and dying leaves so I can more easily see if it's getting better, staying the same or getting worse. Remixed nutes with 2/3 strength base (Aqua Flakes A & B) and 1/2 strength additives. PPM's at 1400 now, much better. Lowered PH to 5.4-5.5...

Yes, I'm using Cal-Mag per the schedule above. One thing I forgot to note though, the PH tends to creep upward and sometimes goes over 6.0 to 6.3-6.4 before I knock it back down to the 5.7-5.8 range. I've heard some like to keep their PH a bit lower, down to as low as 5.0 and never over 6.0...

Below are some pics with lights off. It almost looks like over-watering with the droopy fan leaves - maybe I should reduce the total feedings per light cycle? One thing I'm thinking is that over 2000 PPMs is just too high, so I'm gonna' drain the res and start with the Aqua Flakes A & B at about...

At my wits end on this one. Need some help please. The hardware: Sealed 12' x 12' room, tile floor with drains, clean and tidy, no contaminants 1000w metal halides (veg), HPS (flower) in Sunlight Supply's "Magnum" hoods, 8" air cooled, 1450 cfm exhaust scrubbed with carbon can-type inline...

+1. I'm running an 18,000 btu mini-split with (4) 1000w in a sealed room, two-burner Sentinel CO2 generator, Frigidaire dehumidifier and still need more. Works better when I'm only running two of the 1000s. I'm thinking the 24k would be better for all four. I might even upgrade to a 36k...

Here's what I currently have running in our garden, SR-71 Purple Kush: