Wellis Crystal Chlorine Tablets (18 × 20 g)
What it does
Slow-release chlorine sanitiser tablets that work with the WellisGuard™ system to keep spa water free of bacteria and organic contaminants.
When to use
For top-ups between full packs, or as the standard sanitiser for compact P&P hot tubs and the Iceland Cold Plunge range.
How to use
- Place 1–3 tablets in a floating chemical dispenser.
- Set dispenser flow rate based on spa volume.
- Test free chlorine 2–3× per week, aim for 1–3 ppm.
⚠ 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.