Note that each one got it's own small tab. For 3ft, I don't go for singular filter. I believe mine was eXperience 350. Now you need to generate water flow, yet be able to circulate the water and provide some kind of water flow, water flow should be gentle and constant, you don't want to blow up the entire fauna.
Sponge filter if you wish to provide some kind of air pump facility. But if you can achieve total Eco Balance, then air pump is not required. Air pump tends to help lower water temperature beside providing more oxygen. HOF is another one I added, GEX Slim filter L type. Makes cleaning of water surface easier. I can maintain it easily as well.
All in all, how you going to do this might differ. It is pretty much up to you.
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