I checked twice a week, I have had the clam for awhile it was in my old tank, most of the stuff came from there, I also use the Red Sea Coral Pro salt, it doesnt seem to drop as fast since I started using that salt. I know I am going to have to ramp it all up a bit though since I am going with more and more sps. I will do a reactor later thiis year after I get the new lighting alll bought and put together., How big is your clam? aksothis one is a little under 4" now it was around 2.5" when I got it.