Algae Scrubber Disaster

[PoonTang]

I would bet its oxygen related. Ammonia just cant form that fast and high nitrates would affect your corals alot sooner than your fish.

[Jaws]

Well I don't have any corals at the moment so I don't think I'll have any inclination about that. Seems weird that oxygen would be affected though if a tank has overflows where water falls into the sump plus all the surface interruption I have from having lots of flow. Unless I'm not understanding something.