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Langelier advice WaterBear has some interesting points that have been bothering me too. I need to think about that a lot more. Oh well, at least I won't have any scaling on my pool tile. Now, if only the algae critters will hibernate for the winter, all will be well. Thanks and Happy New...

Langelier Advice Thanks for the advice, Jason. That was about what I was hoping to hear. It should be easy enough to raise the pH slightly. My only problem will be avoiding a pH squeeze since my Taylor test kit only measures up to a pH of 8.0. I think I can work around that by adding a drop...

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'...

Does anyone know if this works -- has it been tested? The table that chem geek references shows that at a given storage temperature the half-life of bleach is a function of the manufactured concentration. For example, at 80oF 10% (trade %) bleach has a half-life of 241 days while 5% bleach...

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...

Thanks for all the information. I'll probably just follow chemgeek's chart pretty conservatively. I only bought the Polyquat because it was on sale and I understand it keeps well. Maybe when I go on vacation next year it'll come in handy. I'm the owner of a brand new pool and a brand new...

chem geek, Thank you for your very informative answer. It answered all my questions, and I think it will be useful to a lot of other newbies. You also touched on another subject I've been wondering about: the uses of PolyQuat60. It seems to be a common opinion on this board that PolyQuat...

The chart in the first post looks like it would be very useful but I have not been able to find a post that tells me how to use it. I think I know what the numbers mean, but Min FC and Target FC confuse me. (I have a similar problem with Ben's Best Guess table). Would it mean that if I bring...