Ocellaris Jaw Locks and dies and male seems to breathing fast

[FishAreFriends2]

I have a pair of ocellaris clowns in a 40g in my basement and I have had a pair of ocellaris for a good year. But recently I noticed the female's mouth looks like it can't close anymore more like it was locked in the open position, I think it caught some sort of sickness. And its breathing picked up as well. It also stopped eating, this went on for a week than it died. The male at the time was still eating till recently it started to breathe fast and it also stopped eating. Its almost a week and it hasn't eaten anything and it stays in a rbta all day long. It still swims around but its breathing fast and it doesn't eat. I have no idea whats causing it. No fishes bullied on them since they are the only two in the tank. No crabs, shrimps. Just a rbta some coarls thats it. So I am puzzled to what caused this problem.

 

[Slakker]

What have you added to the tank recently? What are your parameters? How often do you do water changes? Do you use RO/DI for your water changes?

 

[garygb]

Ammonia makes fish breathe fast, other toxins might too, I'd start with checking that.

 

[rkelman]

I agree ammonia / nitrite possibly. Check your PH and alk while your at it.