Ok, I was helping a friend who has a 350g tank and for filtration he has a 40g sump filled with bioballs. The water however is never clear, so he added 2 pumps that take the water from the sump and push them through 2 Sea-clear canisters to clean it, but the pumps failed and i had this idea for him to redo the filtration. What I was thinking was to removed the pumps and have the sump go back into the overflow like it did, and instead add 2 fx5's filled with sponges to clean the water. the reason the pumps failed was because of the tubing getting clogged and there not being enough water coming out of the sump. would 2 fx5's be able to provide crystal clear water and clean out all the junk in the water?