Wellis Pure Fill — Active Charcoal Pre-Filter
What it does
Mains tap water often contains chlorine added by the water utility, plus dissolved organics. Putting raw tap water straight into your spa wastes some of your spa's sanitiser dose neutralising these. The charcoal prefilter removes them upfront, so your starter chemistry is more accurate and your spa surfaces stay cleaner.
When to use
- Every fresh fill (initial or after a quarterly water change).
- Anytime you top up the spa from the hose.
How to use
- Connect your garden hose to the inlet of the prefilter.
- Connect the prefilter outlet to the spa filling hose.
- Open the tap; water flows through the charcoal media into the spa.
- Replace after ~8,000 L of use (approx. 6–8 hot tub fills).
⚠ 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.