I started my first 55g SW
tank a few months ago. I have a fluval 406, and I also run a aqua C remora S skimmer. The aqua c aren't cheap (and you do have to buy a separate pump), but works great, and my water levels stay really good. I haven't had any problems with algae or cyano
so far. I attribute a lot of this to the skimmer, as i probably do overfeed.
Also, I rinse ALL of the canister's media every week when I do my water change, that way any pieces of food and such can be removed before turning into nitrates. And I rotate changing out pieces of canister so that I don't do it all at once. I did change my carbon to Chemipure and the water does seem to be a lot clearer actually. Overall, I'm very happy with the fluval/aqua c skimmer I have.