Originally Posted by Crispino Labayen Ramos
I clean my external canister filter like you do once every two to three months. When I don't clean my filters that often, algae tend to show up.
Why does this happen?
which media do you replace? I assumed you just rinsed it, should I be replacing one of the types of media? currently I only have the media that it came with in there.
You don't need to replace the bio media. Only the fine filter pad (white). You can simply rinse out the blue one and replace the carbon one (if you're using it)