I am getting a new octopus soon, and I was wondering how to keep it in it's tank? What type of lid do you need? My Octopus is a Carribean Reef octopus. I want to be able to have the filter in the tank, and don't know what kind of lid/filter to use. I'm hoping to find one that isn't too expensive. They need a heater, don't they? And how do you avoid having them climb into the filter or pull the heater down? What kinds of toys do they need?