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.