well before getting to the fact will it work, it will not, because you can't keep, 4-6 14" max fish, in a 85 gallon aquarium, next the p probly wouldn't even touch the tinfoils, even if you got them small, he'd be scared out of his mind, but it can't be done anyway, so no, i probly wouldn't even keep one tinfoil in a 85, becuase they are active swimmers to, so large tanks are needed