I don't uderstand it. Neon never used to do it before... but anyways, heres what happend. I was using the gravel vac and I looked away for one second to make sure my dog wasn't getting into anything... I look back and poor Neon had his tail stuck in the vac. Luckily he wasn't injured, but his dorsal looks a bit funny to me... I include this because I don't know if it has anything to do with the problem.
As I added water Neon's head started twitching and shaking like crazy. I became worried, but he stopped. I noticed that every once in awhile sometimes while I watched him his head would give a little twitch.
That was yesterday. I told myself nothing had happened, then this morning he started swimming up to the surface and his head twitched, so I decided that something's wrong. But what is the problem exactly?