Who Gives A Fish Forums

I've been running my canister filter for months, but it still needs regular cleaning. At what point does a filter become self-sustaining, like it doesn't need as much maintenance? My tank is a 55g with a Fluval 407, sand substrate, and a bunch of Java Ferns. Water params are good, 0 ammonia, 0 ...

I'm pretty sure my fish is an Orange Spot Goby, but I'd love some confirmation - is that the correct name?