+1 to Forrest3320's water change advice.
I have a standard 10 gal with 10lbs live rock and a simple AquaClear 50 filter to remove excess food and any slime from possible coral or invert interactions. The filter contains a sponge, carbon, and nitrogen removal media. I do weekly 2 gal water changes, have a rio 50 pump for flow, and 1 Six line wrasse, pepermint shrimp, and other inverts.
I have zoas, mushrooms, polyp softies, soft leathers, lps, and sps corals in this tank with no filtration issues.