I have a 2 acre lagoon that is about 20 feet deep that I would like to build a filtration system for. I am already running a large air pump with diffuser off solar but want more for the health of the pond. I was planning on linking multiple 55 gallon drums and setting up like large canister filters, but am having trouble with pump selection. I want something that can run continuously year round and more volume the better. I will add another 24 or 12v system to power pump appropriately. Thanks for any pump advice.