I have a tank with 1 Huma Huma trigger, 1 Blue throat trigger, 1 porcipine puffer, 2 panther groupers, 1 lunar wrasse and a Miniatus grouper. Yes, it is a big tank. I wanted to add some life to it buy adding some of the extra xenia that I got. I was wondering if this would work or would the fish just kill the xenia? Also, how do you keep the algea down in a fish only system with out snails and crabs? My nitrates are low because of my refugium, but the algea is still there (and no it is not cyano). Thanks!