I have a 72 gallon bow front, its just about finished fishless cycling. I have an amiracle wetdry with a 500 gph pump with a 500 gph coralife skimer. I want to add a volitan lion a niger triger or dog face puffer and a small zebra eel or undulated. The zebra i understand that he can live in there for life but how long could i keep him in there for?