I just got two clams today I got a gold maxmia and a Derasa clam for about 70 dollar they both are about a inch to a inch and half. I will post picture of them in a few but I have a few question. ---I want to do a freshwater dip on both of them first just to kill off anything I don’t see, how long can I dip them for? And/or is it suggested. -- This may be a hard one my tank is 40 gallon. The only other coral in my tank that I can see that uses Cal would be my two frog spawn and a brain. How often do you think I will have to dose then tank with Cal with the two clam added? The reason I ask is is trying to figure out if it would be worth it to get a Cal reactor for such a small tank. -- the max should be placed at the highest point in the tank with low water movement and the Derasa on the sand bed?