My Midevil, flowerhorn hybrid or what ever he is- has what I assume is constipation. It's still really active but it's super bloated and not eating. It's also the only fish in the tank with that problem. I use Hikari cichlid gold and excel usually but I tried a small bag of tetra color a week ago none of the other fish seem affected, but the midevilhorn. Is there any kind of treatment I can do that won't affect my other fish?