Tank of death! Help!
So I have no idea what happened last night... Other than I woke up and 6 fish had died. I can't find any patterns to what died either.. My CAE, one of my hardiest fish died, while my angel who's suffering from a fungal infection lived.
Only changes made in last 24 hours: I added 4 quarter sized silver dollars. I think these are way too small to have caused a spike in ammonia, considering my already well stocked tank. The only other change is I added romaine lettuce for the silver dollars, in attempt to stop them from eating my plants.
What lived: 5x giant golden danios, 2x angels, 3x corydoras, 1x albino bristlenose pleco, 1x common pleco, 2x Raphael cats, 2x silver dollars
What died: 2x silver dollars, 1x CAE, 1x angel, 1x loach, 1 bamboo shrimp.
So finally, any idea what could have happened? My water parameters are good(other than high phosphates, but been high for 3+ weeks)
And what can I do to stop the dying? I already did a 40% water change. Any help is appreciated.