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def looks like to high a pH that is causing nute lockout. ive seen in hydro to high a pH will cause the leathery looking leafs you described and keep the plant from using other nutes that a lower pH is required to uptake. now 5.5 to 6 isnt to bad a swing, but do u pH down the tap water when u flush?
This looks an issue im dealing with right now. Ive decided its from a P deficiency developed when the clones were in the cloner, running clonex only for far to long and then the syptoms worsened when put into the UC. are your stems purple? what about the underside of the leaf? the lower leaves will start first pulling P from the tips. they will become dry and very brittle, then yellow. stems will turn purple or dark red. the growth is "hard" and there is an overall unhealthy look to the plant. the lack of P will stunt the overall growth of the plant, however the main trunk is the size of a healthy plants that should be twice as tall. I had slowed root growth as well. they were in the system for 13 days.
Good luck!
Could u elaborate your feeding schedule I would def. say an issue with the P. Some strains I grow do this coming out of the cloner but always correct themselves within the first week of nutes. When I ran the aeroflo 120 I always ran 5.4 to 5.6 pump running non stop if my pump shut off for more than a couple hours my plants would very sad maybe dead I dont think overwatering is your issue possible underfert or lockout due to tap water. I now run coco in 10 gallon smart pots ph 5.7 5.9. It very well could be your tap water sounds like u got a nice setup I highly reccomend ro for any hydro at least it eliminates the possible tap problems. And yes some strains wont mind the crap in your tap water while others wont like it. Some plants are picky some are not.
I run E&F but a while back my plants did the same shit. I couldn`t put a finger on it. I switched pot size before the run and didn`t check the way the pots drained. Well all was great until the roots hit the bottom of the pot and were sitting in water. They looked exactly like yours. I figured it out drilled holes and bam within a few hours they already started to get happy.
Man that thing looks like it works really similar as an aeroflo I would say u couldn't overwater that setup. I'm not familiar with that line of nutes so I'm not sure on that. Have you used this feeding schedule with success before it seems like that maxi is not a complete nute. Sounds like u could move those lights up but don't think that is your problem. If your looking for something easy with pretty good results check the lucas formula. I and many others have had great success with it. I ran it for a while on the week side. A lot of people may disagree but I won't run anything organic in these types of systems. run a weak lucas formula and 2-4 ml calmag per gal and 1 ml dm zone per gallon easy trouble free and good results.
lucasformula.com said:Lucas Formula using General Hydroponics Dry Nutrients (Maxibloom)
MaxiBloom and MaxiGro are dry nutrient also from General Hydroponics. It turns out, Maxibloom, used in a ratio of 7 grams per gallon of water*, is very close to the original Lucas Formula (above.) You do not need MaxiGro, and so this is the cheapest and easiest recipe to use.
Add 7 grams of Maxibloom into 1 gallon of water*, and then adjust the pH, and stir vigorously to dissolve the Maxibloom in the water. I advise putting the 7g of Maxibloom into a cup of warm water, dissolving it, and then adding it to the remaining gallon of water, before pH adjusting and mixing again.
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