I'm curious what you guys recommend for a hob filter I have a 55gal FOWLR with 1 clown 1 powder blue tang 1 malinarus wrasse 1 bursa trigger and a small dogface puffer just got a reef octopus 90bh skimmer and I want to change the hob filter the guy sold it to me with its a penguin 350 and I hate it.. thinking of an Ac110 and if you guys think that's good what media should I out in it.. after doing some reading I think the penguin is keeping my nitrate levels high 20 ppm I do a 15 gal water change every other week and can't get the nitrates any lower.. the skimmer is already helping with the cyano outbreak the tank already had when I bought it.. he thought the slime "looked cool" and being new to saltwater I had no clue.. any advice would be much appreciated

