Finally. Natural spa with ease.

Posted by Kristin on 17th Mar 2026

We live a virtually chemical-free life and have been searching for the most natural way to effectively sanitize our hot tub - and this is it. It took a a long time to find these metal discs online because the chemical companies would prefer that you didn’t know about them: one inexpensive product that does the job of 4 powders / liquids. Set up is super simple. Here’s what we do: fill your spa, wedge the disc (in its plastic holster) between the two filter cartridges. Balance the water (we have very hard water and have to add copious amounts of a pH reducer product). Add a dose of non-chlorine shock (we use Aqua Doc brand). Done. Maintenance: one dose of shock each time we get out of the spa. No weekly adding of chemicals, no need to rebalance the water. No off-smells, no chemical bath. No spending $100 / month on inputs. Our spa water is sanitized by copper and silver and crystal clear. Lifeguard’s customer service is excellent - personalized, patient and very informed. Our next investment will be their in line Mineralizer.