I have IG 22K Anthony & Sylvan pool with 2 returns, 2 main drains, 1 skimmer, 1 pressure cleaner line plus drains/jets in spa. I believe Sylvan pools (older ones) all had two returns side by side aiming towards the deep-end. Thats my config for an FYI and I am not sure but I would think more returns are better as long as they are directing the water flow in the proper direction.