Word to the wise: Be very careful with kalkwasser in your main tank. I mixed up a paste of pickling lime to kill one large aiptasia. I drew this mixture up into a syringe, pulled the rock out of the tank and proceeded to inject the vile beast until it resembled black tar.
A very sad occurance.... I had a beautiful baby gold Maxima clam shipped to me from a friend in another state, which I carefully acclimated to my tank for a couple of hours. I placed this 1.5" clam on an empty shell in the center of the rockwork in my 55g under MH lighting.