My saltwater puffer is still with me

I have rearranged his tank since this, aquascaped his 40g, I'll have pics tomorrow

Puff Puff has killed all of his crab friends, and made a new one- a fireworm/ bristle worm. Please don't tell me to get rid of him, I've weighed the risks/benefits, and considering this is my puffers
FOWLR and I'm not trying to grow any corals, macro algae, anemones etc in this particular tank I'm sure that a 3" bristle worm is fine, I'll remove him when he can't hide anymore, I already get him to come out by holding freeze dried jumbo krill with tweezers, he's quite amusing. I also have found a couple peanut worms, an astrid, a ton of tube worms... I have added 5lbs of dead live rock and 10lbs of cured live rock since these were taken.