That hermit is a pain in the $)(*-#)(!!!!! He is at least an inch and a half- maybe bigger. He enjoys a snail or two every now and then. I try to keep him well fed, so that helps with the snail issue. He does such a great job keeping my tank clean that I hate to get rid of him. The biggest issue I have with him is knocking over my frags. Fixed that by using the "plastic cup" method. He's been through FOUR different tank cyclings and lived, so I think he's earned his place.
As far as the colt, the picture doesn't show the depth of my tank. There is quite a bit of distance between the colt and zoo's, so I"m not too worried. I will keep in eye on it though!! Thanks for the advice.