update

Hi Pete,

I have been dosing the tank with Stability, but didn’t know that I needed to discontinue the AmGuard so I guess I will do another full treatment.  After the full 7 days, should I still add it periodically for maintenance? 

It is definitely not a low-level gas issue.  I have a sponge filter, two hang on filters (one for filtration and one with just biological media in it.  I took some well established biological media out of the filter from my main tank and put it in there) and a bubble bar in the tank.  Is it possible he was feeling ill from the ammonia exposure?  He ate for the first time last night in 3 days.  I think the air bubble may have been just that, an air bubble that was stuck to him.  I brushed him with a Qtip and they are gone, thank goodness! 

Thanks,

Sherry