$7.49
See if it's really the one
Search with this product to compare it, find similar styles, or turn up something better before deciding.
SpaPure 1 lb Hardness Increaser: Water needs calcium hardness. If your levels are too low, a small addition of Hardness Increaser brings the levels up safely while not clouding the water. When levels are ideal, you will prolong the life of your spa. The water will also be less aggressive and corrosive.
Have a question about this?
We currently ship within the US, with more countries coming soon.
Final cost and dates are confirmed at checkout.
🇺🇸 Ship from USA · On Agora since 2025
$7.49