When displaying clams at your store or just housing them in your frag tank long term, don’t place them directly on frag racks or on the bottom of the aquarium. The clams will attached to these hard surfaces, making them a pain to remove if they are sold or need to be relocated. Try placing them on a small, flat piece of live rock instead. The clam will attach to the live rock, which helps them acclimate to the tank better and provides a more natural substrate for them to sit on, but also allows the store owner to move the clam around the aquarium with ease. And when the clam is sold, the rock goes with it, which will also help its new owner to acclimate and place it in its new home.