Estimating size of pool

[rpoldervaart]

Are there any of the pool water tests that are accurate enough to calculate the volume of water based on the change in test results after adding a prescribed treatment? In other words, let's say I measure the salt with the Taylor K-1766 drop test method. Then I add a 40lb bag of salt, wait a day or two, and test the salt again. Using something like the pool calculator site, I should be able to figure out the volume of the water based on the change in salt PPM after adding a 40lb bag of salt.

Are any of the other tests and treatment methods any more accurate to be able to do this? I would think it would have to be a test like Salt or CYA that doesn't evaporate or change rapidly, or an application of something maybe like bleach or acid that would have an almost immediate effect so you can measure right away without other factors affecting the results.

Just wondering.

Robert

[PoolDoc]

Some years ago Que Hales of Pool Chlor and the JSPSI (Journal), published a method of doing just that, using alkalinity tests.

You could do the same thing, using a K-1766 and salt additions. Your accuracy would be limited by the accuracy of the tests AND the salt addition. In other words, you'd better weigh the salt. You'd need to test salt levels before and after the addition. I doubt that you'd be more accurate than direct calculation, when pool layout is simple (rectangle, etc.). But, with free form pools in irregular shapes, you very well might get superior results.