The only explanation I can really think of for the massive growth spurt, followed by what was obviously oxygen deprivation at the root zone, must indeed, despite my belive that water temp couldnā??t change so quickly, be water temp razing! All that nice cold tap water that held o2 brilliantly, just must have warmed up (it's my current theory), cheers for suggesting it! Well, I canā??t think of a good and cheap system that would solve that problem; there is a product called oxy-plus, that's meant to increase water o2 levels. By the way, thereā??s a little info on DWC at this link:

Top Tips - The Aero Podā?¢ Professional Deep Water Culture aka The Bubbler

Itā??s pretty well illustrated. Itā??s identical to my setup, although, I didnā??t buy from there.
Gart79 Reviewed by Gart79 on . Water Level in DWC? I have read many places that when the roots have not grown through the netpot you want to keep the water level 1/2" above the bottom of the netpot, and when they have grown through, keep the water level 1/2"-1" below the bottom of the netpot. Now, I never see with these figures how far into the netpot you are putting the plant...Do you put 1" of hydroton in the netpot, the plant on top, and then surround with hydroton? Or is that plant resting on a larger layer of hydroton? Basically I guess Rating: 5