About every other day. I hand feed some corals, and while i'm in there i'll hand feed my big Clown fish, and feed some nori to the tangs,along with the cleaner shrimp...because I like too, it's a bonding moment for me. I do get out when my Crazy Hippo gets excited though, "once bitten twice shy"...lesson learned. First wash my hands, no soap, then I dip them in the sump just to get the saltwater balance right on my skin...if that means anything Lol'
Yes, right after I wash my hands,arms...that saltwater will get ya.