Pool pH Increaser Calculator Australia: How Much Soda Ash
Work out how much soda ash (pH increaser) to add, then confirm with the free calculator for your exact pool volume.
Why Raise Pool pH?
Low pH (below 7.2) causes several problems:
- Eye and skin irritation
- Equipment corrosion
- Etching of pool surfaces
- Reduced sanitization effectiveness
Ideal pH range is 7.2-7.6. Use PoolCalculator.com.au to check if your pH needs adjustment.
Step 1: Test Current pH Level
Use a pool test kit or test strips to measure current pH. Read our guide on how to read test strips.
Ideal pH: 7.2-7.6
Action needed if: pH is below 7.2
Step 2: Soda Ash Dose Chart
Use this chart as a starting point, then confirm with PoolCalculator.com.au:
| Pool volume | Soda ash to raise pH by ~0.1 |
|---|---|
| 30,000 L | ~40 g |
| 50,000 L | ~65 g |
| 75,000 L | ~100 g |
| 100,000 L | ~130 g |
If total alkalinity is also low, raise TA with bicarb first, then fine-tune pH.
Step 3: Pre-dissolve Soda Ash
Pre-dissolve soda ash in a bucket of pool water before adding to pool. This prevents cloudiness and ensures even distribution.
Step 4: Add to Pool
- Turn on pool pump - Ensure circulation is running
- Pour slowly - Add dissolved soda ash to deep end
- Walk around perimeter - Distribute evenly while pouring
- Never mix chemicals - Add separately from other chemicals
What Causes Low pH?
Common Causes:
- Acid rain
- Certain chlorine tablets
- High bather load
- Low Total Alkalinity
- Adding too much acid
Prevention:
- Maintain proper TA (80-120 ppm)
- Test pH weekly
- Balance chemistry regularly
- Use stabilized chlorine
Related dosing tools
Calculate Your Pool pH Adjustment
Use our free calculator to get exact dosage recommendations for your pool.
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