If you scrub your live rock inside the tank, and the white film on the coralline gets flaked of and stirred in the water, what effect can you expect on the water parameters. 1. ca. goes up and dkhº and mg. goes down. 2. ca. and MG. goes up and dkhº goes down. 3. mg. and dkhº goes up and ca. goes down. 4. ca. and dkhº goes up and mg. goes down. 5. all three elements go up. 6. none of the above. I was kind of curious of what other reefers think, so decided to ask on a poll, and please explain briefly if applicable!