I’ve seen people say to run both at once, or use as much filter media as possible in the new filter.
however, is this necessary and if so why? I replace my sponges often, just whenever they seem too dirty after a rinse. Is this not just like replacing the HOB altogether?
however, is this necessary and if so why? I replace my sponges often, just whenever they seem too dirty after a rinse. Is this not just like replacing the HOB altogether?