This is my observation tank. Tank is cycled and I have had the same 5 fish in it for 6 weeks. Ammonia badge changed colors to the first alert stage. I know they are not a good tester but, it’s what I have on the glass. I noticed 2 fish on their side when I got home for work. I’m not sure what happened. I did a 98% water change to water that was same temp. The the emperor was breathing really heavy before. After the water change he perked up and swam away. The regal looks not healthy and swims around about every 45 minutes. Is there anything you can do for a fish that was impacted by ammonia? Weirdly I have 3 tiny juveniles (purple rang, blue hippo and a file fish) that are not impacted.
