Wellis Crystal Pool Check 5-in-1 (Test Strips, 50 ct)
What it tests
- Total water hardness
- Total chlorine
- Free chlorine
- Total alkalinity
- pH
Target readings
- Free chlorine: 1–3 ppm (or bromine 3–5 ppm)
- pH: 7.2–7.8
- Total alkalinity: 80–150 ppm
- Total hardness: 100–250 ppm
When to use
2–3 times per week for private use. Daily for high-occupancy or rental spas. Always test before adding any chemical.
How to use
- Dip the strip in the spa water for 1 second.
- Hold horizontally for 15 seconds.
- Compare each pad to the colour chart on the tin.
- Adjust as needed using Crystal pH Down, Alkalinity Balancer, or chlorine tablets.
⚠ Important — please read before use: Always follow the dosing instructions printed on the product label and on the Safety Data Sheet (SDS) supplied with the chemical. Consult your Wellis spa user manual for product-specific water-care guidance applicable to your model, water source, and usage pattern. Never mix water-care chemicals together directly — always add each product separately to circulating spa water with the pump running. The information on this page is provided as general guidance only and does not replace the manufacturer's instructions or professional advice. TwoRelax accepts no liability for damage, injury, water-quality issues, or equipment failure resulting from incorrect use, improper dosing, mixing of incompatible products, or failure to follow the manufacturer's instructions.