Poolsean knows. He's been very helpful with me and my first year with an SWCG.

But the extremely high calcium isn't good for any pool. Were your T/A to go up to say, 200 (maybe even as low as 150), you could expect immediately for your pool to go milky white. With vinyl pools and reasonable T/A I normally say don't worry about CH, but yours is excessive and is already causing problems.