I personally prefer Cannazym for roots but if they get bad I'd switch to H202 at 2 teaspons/gal every other day of the store bought 3% or the hydro type (35%) at 2 ml/gallon every other day.. You can't mix peroxide with a lot of the zyme products....but I think you can still use your SM 90...you might doublecheck that.

You need areation to your DWC to keep roots healthy....otherwise they will suffocate and drown. Do you have a photo of your setup and roots?

PS...I use DWC for my plants and they do well as long as the roots have enough room and the areation is good.
Weedhound Reviewed by Weedhound on . Drooping tops on the girls I have a plant that is into flower stage for 2.5 weeks. The tops are drooping. She is under an array of Compact Flourescents, with a fan continuously circulating (day & night). She is a special strain in a DWC hydo unit, using PPB, Hydroguard & SM90. Water is room temp (76%F) and is air pumped. Fan on lower leaves. Since she has gone into flower mode, her tops are starting to droop / curl under. PH is maintained at 5.6; She is flushed using Clearex 2 to 3 week intervals. This happened on her Rating: 5