I set up a 54 gallon tank 6 months ago. The Fluval 404 was filled by LFS
with lots of great stuff (though I don't know what!).
At that time, I was told that the filter needs changing or cleaning or new media maybe twice a year.
The tank is doing superbly. It is a fish and reef tank, soft corals only, live rock, live sand, UV
light, two powerheads, skimmer, shrimp and algae critters. I have done regular water changes.
Should I open the filter and change all or some of the media? Should I do it at the same time as a water change?
Thanks....your advice and suggestions are appreciated!