Features
Mechanical filtration is provided by the replaceable floss roll impregnated with highly activated carbon. The floss roll is a dense, highly absorbent material that traps particulate material and debris. Chemical filtration is supplied by the exceptionally adsorbing activated carbon which removes dissolved organic impurities. Biological Filtration is provided by the Super Porous Ceramic Cylinders where beneficial bacteria work to remove toxic ammonia and nitrite. Very Beneficial in Turtle Tanks or Aquariums with Amphibians.
Specifications
Both of them keep my tank crystal clear.
Jebo 502 is easy maintenance, while Resun CY 20 is a good canister filter, small and reliable.