1. What is the Pool Acid Dose Calculator?

The Pool Acid Dose Calculator helps determine how much muriatic acid or sodium bisulfate is needed to lower your pool's pH to the ideal range (typically 7.2-7.6). Proper pH balance is essential for swimmer comfort, chlorine effectiveness, and pool surface protection.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( V \) — Pool volume in gallons
• \( \text{pH}_{\text{current}} \) — Current pH of pool water
• \( \text{pH}_{\text{target}} \) — Desired pH (typically 7.2-7.6)
• 0.00016 — Conversion factor for pounds of acid per gallon per pH unit

Note: The calculation is adjusted for muriatic acid (31.45% concentration) which is more potent than dry acid (sodium bisulfate).

3. Importance of pH Balance

Details: Proper pH (7.2-7.6) ensures:

• Optimal chlorine effectiveness
• Swimmer comfort (no eye/skin irritation)
• Prevents corrosion or scaling of pool surfaces
• Maintains water clarity

4. Using the Calculator

Tips:

• Measure pH when water is circulating and at normal temperature
• Add acid slowly to the deep end with pump running
• Wait 4 hours before retesting pH
• Never add water to acid - always add acid to water

5. Frequently Asked Questions (FAQ)

Q1: How often should I check my pool's pH?
A: At least twice weekly during swimming season, more often after heavy use or rain.

Q2: What's better - muriatic acid or sodium bisulfate?
A: Muriatic acid is more cost-effective for large pools but requires careful handling. Sodium bisulfate is safer but more expensive.

Q3: Why does my pH keep rising?
A: Common causes include: aeration, high alkalinity, new plaster, or liquid chlorine use.

Q4: Can I use this calculator for saltwater pools?
A: Yes, but saltwater pools typically need more frequent pH adjustment due to chlorine generator operation.

Q5: What if I add too much acid?
A: Raise pH with soda ash (sodium carbonate) or aerate the water. Always make small adjustments.