Hi bought a few fish this week but one clown that I got seems to have just gone missing. I think it's died and is in the rocks maybe somewhere but I cant get it out. Have a jump guard on so didn't jump. Nothing in the overflow or usmp either. Its a 90 gallon tank and only a couple months old ( I upgraded from a new tank but I say its pretty new bc it still cycled at the start) Will I have ammonia issues?