I would like to buy a Manderin, and I had a quick question. What exactly are pods, I'm new to the fish hobby and do not want to stick fish in my tank that do not belong. I have a 29g bio cube with about 40 lbs of beautiful live rock. I have no life except a hitchhiker baby feather duster from a LR and some worms that also came with my LR. Please advise, I love the manderin and your tanks look great!