The main problem is that you are using rockwool, which of course sucks really bad and is not for beginners. Did you condition your rockwool first?

Also, if you want a better response to plant problems, maybe you should post them in the plant problem section.
Opie Yutts Reviewed by Opie Yutts on . Possible Problems I have a DWC set up and I think I'm running into a few problems with my plants. It seems a few a them are getting lil brown spots and the tips are yellowing. Also, some of them are curling upwards and a few are drooping. The only thing in the res is water, ST, and less than teaspoon of H202 thas all been pH'ed. What could be the problem, i'll be posting some pics here in a few. SOS!!!! Rating: 5