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I think you're right, it does seem like they're drowning. I called the company (dwchydro.com) that makes the system a few days ago and I asked whether I needed an air pump since it seemed to me like the plants would drown. He said I didn't need one. I'm using RO water so that should be ok. Is there anything I can do about the oxygen situation without having air stones or pumps at the moment? Maybe I'll run out and get some air stones tomorrow if they're still alive.
update:I just found some 3% hydrogen peroxide so threw that in there (12ml/gallon). I think they must be drowning since it just dawned on me that the only two plants that aren't wilting are the two smallest ones, so a greater percentage of their roots are above water. I elevated the baskets of the wilting plants about two inches with some paper towels. Hopefully that will help.
Last edited by salo99; 03-04-2009 at 02:17 AM.
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