Sick chromis?

[vacuumlad]

My chromis fish is just sitting on the bottom of the tank. He was in the corner but now he is on the bottom. Peramerters look fine but I added some prime. The other things in the tank are a snail, 3 blue leg hermit crabs, 1 small clown fish, a purple fire fish, and my chromis. What could be wrong?? His body looks fine and all fine look fine as well

 

[Sniperhank]

What size of tank? What are the actual parameters? How long have you had it?

 

[vacuumlad]

The tank is a fluval evo 5 gallon. I went home today to look at the chromis and couldn't find him. Salinity is 1.023 and ammonia is 0. I don't remember the other levels but will check them tomorrow

 

[Sniperhank]

That tank is way too small for those fish. I'd bank on parameters and aggression in such a cramped system with fish needing 20 gallons and up to be able to live a healthy life.