The Burgess' Butterfly is quite shy and should be provided with multiple hiding places. The ideal aquarium will be at least 50 gallons and will contain plenty of live rock that will provide cover from the light and a supplemental food source. They are not good candidates for the reef aquarium, as they will pick at any feather dusters, anemones and LPS corals. However, they are useful in a reef aquarium that does not contain the former, as they will control aiptasia anemones.
https://www.liveaquaria.com/product/...45&pcatid=1845
just a heads up of what I read compaired to the info you are giving