Biological sponge filter - commercial grade and easy to use
These hand made sponge filters help me run my 50x tank fish room, saving me time and money - after 20yrs and all still going strong. Extra large surface area - 150mm x 100mm x 100mm, with drilled PVC pipe and elbow and weighted down by ceramic tile. To clean - when doing water change, simply pull the inlet pipe out and using the waste water give the sponge a few squeeze then return it back to the tank and insert the inlet pipe - less than a minute. Less fussy and mess than consumer based prod