Have been doing a FOWLR tank and i would say I’ve been successful with only 2 fish deaths ( died same day and from petco so doesn’t count). I’ve bought all of my live rock from petco and they were littered with hitch hikers. Bristle worms and some kind of white tiny pod that scatters off the side of glass when I turn lights on in the morning. So I see lots of them in the morning for the first 10 mins daily for 6 months which is a good thing I guess because this Mandarin fish is still thriving after 5 months and only dumped 1 small bottle of red Pods I bought with the fish. Guess everything worked out for me and my expirment with mandarin fish. I didn’t expect to be able to keep him eating after hearing all the talk on here. Everyday I see him scanning all over the tank all day picking things constantly so maybe I just can’t see them on the white sand and he’s eatin good