i wasnt sure if this goes here since it is giant clam section but it is a clam so here it goes.. i was reading on cleaner clams and want to buy a couple to filter out some nitrates in the water my question is can i put them in the sand of my fuge so i can keep a closer eye on them and if the die are easily removable? Will they do the same job in here since all of the water comes through here anyways? or do you have to put the clams in the actual display tank so they can filter out the sand beds?