Fish question

[StirCrazy]

Originally Posted by reef_raf

Steve, I thought of that. but those lights aren't going to drive photosynthesis enough in 30 minutes to affect O2 levels. Unless this is one hell of a planted tank.

but it will allow the consumption of O2 to stop and allow the power heads or what not to reintroduce O2 into the water. so it could very well be this fast.

try this, aim a power head at the surface so it chops up the water pretty good and see if you still have the problem the next morning.

Steve