This morning I woke up to one fish in my tank. I have or had 2 clown fish but one is gone. It is a quarantine tank so there’s not very much in it. My filter cannot suck in any fish as well as as of the powerhead. Would it be possible for one clown to eat the other. I am so confused. I do have a cat but he never goes after the fish! Plus i have a top on it and it would have fell of if he was getting into it. Help soo confused!