Hi everyone I have a 350 g tank with 1 rena xp L 1 rena xp XL and 1 fluvel fx6 my question is can I take one of the renas dump everything thats in it and fill it with bio balls? Would this work better? Also I added a extra box of bio rings to the fX6 is this ok? I didnt kno if the amount givin in the box is the suggested amount or if its just what they give u. Thx for any input everyone