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Measured pH 7.4 --> 8.0 Total Alkalinity 90 Cyanuric Acid 25 Calcium Hardness 200 TDS 550 I have only owned a pool for about 6 months -- this will be my first winter. I live in a semi-desert region of Southern California and I won't be 'closing'...

There must be an easier way to find the reference to this post which references this site. And add an attachment:

I have an outdoor in-ground spillover spa that uses the same pump and filter as the pool. Part of the pool return water is bypassed into the spa which then overflows into the pool. I've always read that spas require different maintenance than pools because of the higher bather load and higher...