What size tank? Two dwarfs in one tank is ussually not a good idea unless the tank is large and you have lots of
LR. Potters angel is pretty hardy and easy to keep, once past the crucial acclimation period. Venustus or Blue-backed angel/purple masked angel, is considered difficult to keep. Getting it to eat is the main challenge. It seems to prefer sponges and needs a lot of
LR for grazing and hiding. I would skip it. This species is listed in multiple genuses on different websites so correct info may be sketchy.