Pods are little tiny animals that fish live to eat, if you set up a sump with refugium you can have them reproduce in there ane it will be natual food for yur fish.
Well, you need a way to get the water down there, wether its drilling your tank and having an internal overflow, or using a hang on back style. Once you have that and return plumbing its as easy as pumpi. The water back up
oh ok thanks ill investigate a bit more on it for the future but as of right now just going to try and get it started with the canister filter i have but thanks for all the info