Ok, I have been trying to maintain a good calcium level for as long as i've had a test kit, but cant seem to get it above 150! I use Seachem Reef Complete twice a week, sometimes more, but it seems like it never comes up. All I have are live rock, fish, and some snails/hermit crabs and its almost like they are sucking my calcium suppliment dry. My pH is usually good, so i'm at a loss for whats going on. Should I use the calcium stuff every day or keep to the directions and use twice a week?