brown roots : i'm sure Zandor knows

[fhydro]

Hello,
i'm growing DWC with air stones and GH flora series. I know now that flora bio clogs the air stones. OK. But what causes that brown mud that sticks to the roots. I don't understand. Not in each bucket. I think it asphixiates the plant at last. Do you change air pump, air hoses on a regular base to avoid mold ?
Thanks for answering.
Fhydro

fhydro Reviewed by fhydro on 12-10-2006. brown roots : i'm sure Zandor knows Hello, i'm growing DWC with air stones and GH flora series. I know now that flora bio clogs the air stones. OK. But what causes that brown mud that sticks to the roots. I don't understand. Not in each bucket. I think it asphixiates the plant at last. Do you change air pump, air hoses on a regular base to avoid mold ? Thanks for answering. Fhydro Rating: 5