Hello all i bought 2 sea hares for my 110 gal and they dont seem to want to get off my sand bed. had them for 2 weeks now and one tends to bury itself in my sand and they dont want to go up and eat my hair algea off the rocks up high. Dont know if they are lazy and just want to eat what they can reach or what.Ive even put them up on my rock and they still go to bottom of tank and eat down there. Any help would be app. thanks