I personally got the InTank media baskets, but that is the expensive option and I asked for at least one of them for Christmasthank you, what would you recommend to put in the first and second chamber for filtration?
They're great media baskets, but there are half a dozen other options on etsy that are 3D printed if the $50 price tag (each) is a bit stiff for you. Search for the evo 13.5 on etsy and see what comes up, people have made an entire -thing- out of modding this tank.