Common? Obviously. Safe? I would be curious to see the publication where it is not detrimental to the fish prior to the water successfully completing a "nitrogen cycle".

I hate to make a diagnosis over the interwebs from a photo but, the gills and kidneys on the bluegills appear to be suffering from hyperplasia, a symptom of NH3.

If Snipe is correct about the "eye bulge", it could be "Pop Eye" caused by corneybacteriosis. Another symptom of NH3.

If I was to shake my Magic 8 Ball...

Last edited by Joey Quarry; 06/20/19 05:44 AM.