[apex82]

I have not taken the powerheads out and washed them yet. If they are not better by tomorrow, I will.

Ya I talked to water company today and they have been doing a "flush" in area the past while... however they said the chlorine has not been increased that much. I am using prime and has been fine in the past...

Do situations like this take awhile to fizzle out? It has been two full days since the episode, not sure if they should be back to normal by now? I have changed about 50 gallons of water on a total volume of 95 gallons or so. As far as bio-load, skimmer is rated for much larger tank with a heavy load and most of the fish are smaller than 3 inches. I am not sure how it could be lack of oxygen? I have tons of flow agitating the surface with an open top, is this not adequate? Thanks for all the help and suggestions!