how many hermits in a 120?

Depends. I wouldn't put more then 1 per 2-3 gallons. Some people don't have any only because sometimes you get a blue leg like I did that gets zoas.
 
I followed Ron Simek's suggestion on this, one hermit per 10 gallons. Even so, the blasted things seem to hate where I put my frags... Blasted hermit crabs. Ugghh.

Matthew
 
My suggestions: 0

Hermits are bad. I've had them eat LPS, softies, snails, etc. They are bad news, IME, in a reef tank.
 
Back
Top