OK, longtime lurker, first time poster on my first grow. I started out with a few plants that never got past the seedling stage. The one that survived that first round is now about four to five weeks old, three weeks in the DWC.
I have a 400w HPS on 18/6 about three feet above the top, ph is 5.6-6.0 without any major fluctuations, don't know humidity but it's probably pretty low because its not that far from my heater. don't have a tds meter or ppm because I've already spent so much.
OK, I have been having meltdowns every three days because everything changes so fast. The latest was two days ago when everything seemed to be going fine, reaching for the sky, then like three hours later, bam, drooping leaves. There were little yellow spots on the leaves, toward the tips of the new growth. I use the GH trio and had recently ramped up to about 2/3 the recommended use There were also some sections of discoloration on the roots but my res is 70, so I don't think it's root rot. It does smell a bit like a fish tank in there though.
So I read that it was possibly nute burn, then replaced with ph adjusted water only, and that was after dipping the roots in ph'ed water for about half an hour and sprayed all the gunk off (I used latex gloves to feel if it was slimy and it wasn't). I also read that I should only use ph'd water for a couple days, so I've done that.
Things started looking up then tonight I get home, and the top leaves are folding in half near the stems, and the whole plant is drooping like crazy. There's also a bit of discoloration again.
So, is there anything that I've done right, and is there anything else I can do better?
The first pic is this afternoon at about 3, then the second two are tonight about midnight. The plant on the left is the one I'm talking about, the other two I just transplanted yesterday (hence the screen). I have no idea what strains they are because it's the Nirvana mix and they don't tell you which ones you get.
Please help. Thank you, you kind souls