Love/Hate Hermits

I have to openly admit my love/hate relationship with my hermit crabs.  In my 55g tank I probably have about 25ish hermit crabs.  I love them because they keep everything 'cleaned' up... HOWEVER I think they're too hungry.  Not wanting to over feed (feed twice a day, once with flake, and then a second with either mysis or brine shrimp) for algae reasons.
My Hermits keep killing things...   I picked up 4 turbo snails.. hermits have killed 2 of them, not sure if its for their shells or not, as it would be like a child trying to wear my clothes, and just last night, my green-leggd crab was in the process of molting and they got him when he was defenseless.

My real question/comment, how many hermits does everyone keep in their tank? is 25 to many for a 55g? I can understand and accept the loss of the margarita snails, I have to look twice to see if its a snail or crab , but the turbos are a little bigger hit.

Side subject.. do peppermint shrimp stay hidden all the time? I'm on my 2nd pair, they just don't want to come out... are skunks any better?

I would do a skunk they are great out in the open they will clean your fish! Hermits... I HATE... i dont have any in my tank they were killing all the snails and would knock over the corals! i pulled them all out of the main display. I do have about 10 in my sump though

+1 to what Ryan said. Get some nassassarius snails, and a brittle star and you'll be all set and won't need hermits. I do not like hermits - I think they are cool but not worth them eating all my snails.