Join Date: Nov 2007
Location: Southern Maryland
Sounds like they are starving for air. Run an airstone or put your water outlet just at the top of the water level so some of the surface is disturbed. It will help some with the air. If you leave it like it is too long, they will die. You might want to get a C02 indicator to see what the level is at. It will be worse when the lights are out as the plants won't need the C02 and the levels will rise.