add one more filter sock if you wanna learned how to make one like this here some basic parts list…. my owned design this is 5 in 1 filter easy maintenance filter.. easy to make this filter will work up to 10.000gal basic parts list stainless steel mesh 200/300 microns aquarium tank 50 gallons 5/8 thick glass for pvc and ssteel mesh holder acrylic for divider