Othicx's 220g

[whatcaneyedo]

Maybe if the valve is cleaned religiously... which would mean it should be installed with with a ball valve and union on each end so that it can be removed and soaked in vinegar regularly. A lot of people complain about filter sock maintenance but compared to that they're a breeze. I've seen check valves fail and I know what the aftermath can look like. Definitely not worth the risk in my opinion. Plus 3600 minus head pressure isn't much flow for a 220gal tank unless Othicx only wants to keep soft coral so you may want to add another pump or some powerheads anyways.

BTW that last picture looks like a Euphyllia paradivisa. But its its kind of hard to tell from the photo.

Corallimorpharia is the Order, Discosomatidae is the Family and Rhrodactis is the Genus.