I had trouble with algae in a dwc set-up, roots got slimy, i cut them and nursed them for a month and wasn't getting anywhere. I transfered them to dirt and i think one is going to make it. I started one in dirt and it has been very healthy from the start. I thought i had a run of bad luck so i bought 5 more. Started 3 in dwc in a new res, new air stones and tubing, slimy roots in 3 days. Transfered them to dirt before any real damage was done. I was using hygrozyme, H2o2, and a chiller I should not be having root problems.