How Often Should I Drain and Refill My Hot Tub?

For clean, safe, and enjoyable spa water, you should drain and refill your hot tub every 3 to 4 months—even if you're keeping your water balanced with chemicals. Over time, your spa water accumulates dissolved solids from body oils, cosmetics, and chemical residues that your filter and sanitiser can't fully remove. This build-up can make water harder to manage, less comfortable to soak in, and can even shorten the life of your components.

Here’s a quick guide to help you decide when it’s time:

• Regular use (2–3 times a week): Every 3–4 months

• Heavy use (daily or by multiple users): Every 2–3 months

• Infrequent use: Up to 4 months, but always monitor water quality

  
  

We recommend pairing your refill with a Spa Flush to remove hidden biofilm in the pipework and a deep clean of the surfaces and filters. Once refilled, use your Spa Fuel essentials to rebalance the water correctly—our packaging colours match your test strip results to make this process simple and fool proof.

💧 Tip: Set a reminder or schedule it with the seasons—drain in spring, summer, autumn, and before winter shutdown if you close your spa.

Spa and Hot Tub Flush (500ml)

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