kH and pH and Calcium problems

[Cal_stir]

Check this out.

http://reefkeeping.com/issues/2006-02/rhf/index.php

[Aquattro]

Something isn't right then. Reef Crystals is pretty high in Ca, and regular water changes should bring it back up to level with moderate consumption. Unless you have a tank overflowing with SPS that need trimming every other week, your Ca shouldn't drop to 300. Can you verify that number on a second test kit?

[moppy]

I did get it checked by JL and my readings were all correct...

[Aquattro]

Any noticeable amounts of precipitation on heaters and pumps? Or, do you have a huge amount of coral that is growing quickly?

[moppy]

No precipitation and no major coral growth (very little SPS right now)

[Aquattro]

I guess, at this point, measure it often and see if you can find a pattern. If it's 450 now, it shouldn't go down significantly before your next water change, which should replace any used up

[moppy]

Thanks for everything so far but no one has really answered the main point to my question:

How do you keep pH from raising when you have to raise your kH? Or can you? I know some of you said that 8.5 isn't bad but my tank used to go from 7.9 to 8.1...

Any solutions or do you just not worry about it? Wouldn't this really affect SPS if you had a tank full of them?