pH decreaser (muriatic acid) calculator
PROMuriatic acid (31.45%) to lower pH.
Short answer: fl oz ≈ (gal/10k) × (ΔpH/0.2) × 10 × (TA/100). 20,000 gal, -0.4 pH at TA 100 = 40 fl oz muriatic. Enter your measurements above and the ph decreaser (muriatic acid) calculator returns the quantity, unit conversions and an estimated cost instantly, in imperial or metric — no sign-up needed.
What do you need to measure?
What is the answer?
Muriatic acid
40.0 fl oz
Cups (8 oz)
5.0
How does the ph decreaser (muriatic acid) calculator work?
fl oz ≈ (gal/10k) × (ΔpH/0.2) × 10 × (TA/100).
What does a worked example look like?
20,000 gal, -0.4 pH at TA 100 = 40 fl oz muriatic.
What do people ask most?
›Also lowers TA
Yes — planned acid dosing is how you drop TA.
›Dry acid alternative?
Sodium bisulfate — safer to handle but adds sulfates.
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Where can you learn more?
Read field notes on estimating and materials, or browse every calculator we make.