anyone have any ideas/successes/non-successes with trying to keep a clean up crew in their puffer tank? i was looking at getting a nice little clean up crew for extra food that gets thrown everywhere from them taking a chuck of food and spitting half back out in tiny particles. i want stuff that is mainly going to keep the top of my sand clean and something that will burrow in my sand and keep in there clean, i believe its the cerith snails? im not worried about algae on the glass cause i have a lawnmower blenny that is constantly picking the back pane of glass at the algae back there so i want to keep as much algae on the back glass as possible for him. i got one hermit crab by accident when getting saltwater ghost shrimp, dont know how the girl didnt see that she put it in the bag or maybe she didnt care. but that was months ago and he is still alive and wandering around the tank, climbing stuff, always out in the open and the puffers have never messed with him.