Be careful of the frogs:) I had one that took my 9" volitans and passed on two days later due to indigestion:( So there you go, i lost both precious at one go. Stonefish is slightly more docile that the frog which is very unpredictable. Dun be fooled by its look. And by the way, thats too heavy a bioload, you dun have to feed these predators everyday, i fed mine once every three days.