# Thread: How to estimate borate amount in your pool without test kits

1. ## How to estimate borate amount in your pool without test kits

I recently re-edited and made some BIG corrections, that you may notice when you re-read this:

Using the Pool Calculator, type the size of your pool (in gallons), then in the Borates section (this is what I can come up with so far) type "0" in the first box and "50" ppm in the second. This should tell you how many ounces of borate you must add, and then divide that total amount by 76 ounces (which is one box of borax, and I'm going by the "20 mule team borax" method as I haven't done any other). This will tell you approximately how many boxes of borax you need. For my 12,000 gallon pool I need about 9 boxes to reach 50 ppm. Now, divide 50 by "amount of boxes you need" and you will get the amount of ppm that is added to your pool for one box of borax. For my pool I get 5.6 ppm of borates per box.

Next, get the max depth of your pool in inches (it's easier to calculate percentage with inches), and make an estimate of how much water your pool would lose in a one month period. Different pumps and filters pump out different amounts of water per sec./min. My pool loses about 16 inches of water per month from backwashing once a week, which is 22% of pool water loss.

In conclusion, if there isn't any place that sells borate test strips/kits nor a pool store that does it for you, then you can always try to guesstimate the amount you have by making some effort to record, compare, and calculate how much of it you might have or might not have in your pool.

2. ## Re: How to estimate borate amount in your pool without test kits

Borate test strips can be ordered online for about \$10...it's much easier and this place usually ships fast and is reliable
http://www.h2osupplies.com/insta_test_borate.html

Your method is cumbersome and prone to error. Too many facters can and will lead to cumulative errors. Since there is not a lot more that can be said on this subject I am locking this thread.

3. ## Re: How to estimate borate amount in your pool without test kits

Originally Posted by waterbear
Borate test strips can be ordered online for about \$10...it's much easier and this place usually ships fast and is reliable
http://www.h2osupplies.com/insta_test_borate.html

Your method is combersome and prone to error. Too many facters can and will lead to cumulative errors.

How is my method prone to error? At least be specific...

4. ## Re: How to estimate borate amount in your pool without test kits

Originally Posted by JRM75

In conclusion, if there isn't any place that sells borate test strips/kits nor a pool store that does it for you, then you can always try to guesstimate the amount you have by making some effort to record, compare, and calculate how much of it you might have or might not have in your pool.
You yourself said it was prone to errors ! You are assuming that the calculator is totally accurate and you have not taken splashout or rain into consideration, nor the amount of water lost by backwashing.

I am locking this thread since I don't want this to drag on when there really is not much more to say about it. (As it started to happen with two more posts than really needed. Your quote of my first post appeared as I was locking the thread!)

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