Who Gives A Fish Forums

I run the lights for about 10 hours a day. Could that be too much? They're on a timer, but I've never thought about cutting it back.

Could be low oxygen levels. Have you checked surface agitation? If your filter output isn't breaking the surface much, try adjusting it or adding an air stone. Platies are sensitive to oxygen levels, especially in warmer water.


Thanks, I'll try that. The filter flow is pretty low, so that might ...

My Platies have been acting weird lately, swimming erratically near the surface. Tank's a 20 gallon, parameters are 0 ammonia, 0 nitrite, 10 nitrate. Temp's steady at 78F with a Fluval heater. They're eating fine but seem skittish. Any ideas?