The tube that draws water into my filter appears very dirty. The water flow is completely fine and there is no problem with blockage. Is there any need to clean this tube or is it ok as long as there is no blockage?
i clean the tubes to my canisters once every 3 months.. just enough to keep any SERIOUS grunge from building up.. otherwise, they work great. and yeah, the tools they make for cleaning these tubes are similar to baby bottle brushes, only longer and flexible.
even if your filter still is flowing properly, i would still reccomed cleaning your tubes. you dont want that algie spreding everywhere... lol... what i use is a bottle brush.. works great! also try using hot water...