Estimate baking soda to raise TA, or follow acid + aeration steps to lower TA safely.
Pool Toolkit provides estimates for educational use. Water chemistry varies with testing accuracy, circulation, temperature, borates/CYA, product strength, and measurement error.
Total alkalinity (TA) helps buffer pH changes in your pool. This calculator estimates how much baking soda is needed to raise TA or provides an estimate of the total muriatic acid required to lower TA through repeated acid and aeration cycles. Accurate pool volume and test results produce the best estimates.
When raising TA, add baking soda in portions with the pump running, then circulate and retest before adding more. When lowering TA, never dump in the full acid amount at once. Lower pH safely, aerate to raise pH without raising TA, then repeat until the target is reached.
TA acts as a buffer that helps stabilize pH. Low alkalinity often allows pH to swing quickly, while excessively high alkalinity can make pH difficult to lower and encourage scale formation. TA should always be balanced together with pH, calcium hardness and CSI instead of being treated as an isolated number.
Most residential pools operate well around 60–120 ppm depending on sanitizer type, pool surface and overall water balance. Saltwater pools and pools managed by CSI may intentionally use different targets.
Usually no. Lowering TA is normally done through repeated acid and aeration cycles while keeping pH in a safe range.
Baking soda primarily raises total alkalinity and has only a modest effect on pH compared with products designed specifically to increase pH.
Because the two values affect each other, test both and make adjustments with your overall water balance in mind.
Don't chase a single TA number. Look at pH, calcium hardness, water temperature and CSI together before deciding whether your alkalinity actually needs adjustment.