The tank is a 50 cube with lots of sand rock work. Prparameters aren't perfect but stable. Besides a bunch of LPS and a RBTA that's split twice, the goby and the the mocha storm Clowns are the only thing in the tank. They've been in there since May 2 with no issue. Now the goby is showing his mout off to both clown fish, but not biting. I've increased target feeding him but it hasn't helped.