Review on Efficient Filtration with XINYOU XY-2893 10 Layer Sponge Biochemical Water Corner Filter by Kristina Scott

This is the exact size to use as a pre-filter for the Fluval 306 Canister Filter. It also has no noticeable effect on flow. All I've done , was removing everything from the foam and then rolling up some filter foam to cover the bottom cleanly and then sticking the end of the air intake into the filter a few bucks my aquarium is now ready to breed shrimp what got I did with the insides after using the foam as a pre filter? with the big round filters you get from Revain. And finally since the pieces are modular you can do it if you have several of them and just one corner of your aquarium into a large corner filter.