# Some math help...

#### Sunnydaze

Silver Supporter
Math was never my strong suit. I'd like to calculate how much I'm increasing my TA with fill water.

For example, if i add 200 gallons of fill water which is 130ppm TA, how much does that increase the TA in a 15,000 gallon pool?

Any math whizzes out there?

#### mknauss

TFP Expert
Bronze Supporter
Math was never my strong suit. I'd like to calculate how much I'm increasing my TA with fill water.

For example, if i add 200 gallons of fill water which is 130ppm TA, how much does that increase the TA in a 15,000 gallon pool?

Any math whizzes out there?
A little. Manage pH.

#### Sunnydaze

Silver Supporter
A little. Manage pH.

I know. And i do. I'd still like to know though. I'm driven by curiosity.

#### PoolStored

Gold Supporter
TFP Guide
Assume you have a 15,000 gallon pool, with TA of 100ppm for sake of arguement. Adding 200 gallons of 140ppm

((100 / 1,000,000) x 15,000) = 1.5 ((140/1,000,000) * 200) = .028

Then reverse. Total = 1.528 / 15,200 = .00010053

.00010053 * 1,000,000 = 100.53

It will raise it .53 PPM

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