Hi, having some heat issues here at the moment, when I got home today the tank was around 28-29C/ 83F Most of the fish were OK, although perhaps a little lethargic, except for one female molly that was gasping and wouldn't move from her position. Her fins were flapping pretty quickly, and her eyes looked a little sunken (or the flesh around them was swollen). It's a little hard to describe the eyes, but it was different from the pop-eye pics I've seen on a few sites. Before I googled away looking up symptoms, I did a 30% water change to bring the temp down and see if that helped. The new water temp was a more reasonable 26C/78F. I also added an aerator to help with the oxygen levels. By the time I'd convinced myself it must be columnaris (not a perfect fit by any means, just the hardest for me to rule out) she seemed to have completely recovered. It's a few hours later and she seems back to her normal self, and is currently playing in the current from the filter.
Obviously I'll be keeping a close eye on it for a while, and I've still got to test the water parameters. This aside, has anyone seen similar behaviour caused by heat? Seeing the recovery makes me doubt that it's a disease, stress seems a much more likely factor to me. Thanks for any advice, whenever I see something like this I like to try and find the likely cause so I know what to do in the future...
