Spa Scale Defender

Spa Scale Defender
Spa Scale Defender
Spa Scale Defender

Spa Scale Defender

Regular price $12.95
Delivery to US-48 Only This item is not available for delivery to Alaska, Hawaii, or Canada.
  • In stock, ready to ship
  • Inventory on the way
Ships next business day.


Spa Scale Defender prevents calcium formation in hot tubs. Inhibits chalky surface & filter lime buildup. Prevents premature heater failure. Improved - more active ingredient, less water formula. Use with Metal Stain Preventer for superior water quality.

  • Defends against damaging scale
  • Concentrated lower-dose formula
  • 16 oz. bottle

Product notes: Just 1 oz. concentrate treats up to 400 gallons. Guaranteed to equal or outperform Leisure Time Defender.

Customer Reviews

Based on 40 reviews
Kathleen J.
No more scale

Before using this my water heaters were burning out within a year. I have well water and found without this product my heating element would quickly build up a white scale over the entire element and eventually stop working. Since using 1 oz a week of the scale defender I haven’t replaced my heater in over 5 years. I’m sure it’s coming soon as they are normally good for about 5 years from what I hear.

Donald S.
Scale maintenance

Seems to work well so far been using it about a year.. and less to add then other brands

Doug L.
Works OK but what's with the slimy residue in the bottle?

This product seems to work OK but I've noticed that, over time, a slimy residue starts to grow within the unused portion of this treatment. In other words, once I've used about half the bottle I start to see stuff floating in the chemical. It's slimy and doesn't look like something that I want to put into my hot tub. What is this? At first I thought it was just something with the particular batch/bottle I had but I see the same thing happening on subsequent bottles of this that I've purchased.

Thank you for your feedback. The residue you're describing is a natural occurrence caused by the product's binding agents. It is safe to use and will not harm your hot tub. However, we understand your concerns and are constantly improving our formula to minimize this residue. Thank you for bringing this to our attention. We appreciate your continued support. Have a great day!

Charlie P.

unexpectedly smaller container than competing brand. probably will seek competing brand next time.

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