Green hermits are not a species I would choose but the reds could be decent. The key identifier for the red hermits is the yellow eye stalks. Scarlet hermits (Paguristes cadenati
) are actually very reef safe as a rule and should not be a concern. The common red leg (Clibanarius digueti
) is a little more hit and miss.
As I said though given the right mix of snails, hermits really are not needed. Nassarius, cerith, nerite, trochus, margarita and true turbo's in varying amounts will add a great diversity and pretty much cover all the bases. At the least, I would suggest nassarius for the sand bed, cerith for the substrate surface and glass, and a combination of nerite and trochus for the rock. For a 75 gal
(depending on need) I would get about 15 each of the last 4 mentioned.