Sirona® Defend
Product Overview
What pool and spa technicians reach for to reliably prevent mineral scale and surface staining.
Supplied in a 32 oz container, Sirona Defend utilizes a specialized polymer shield formula that chelates dissolved metals and binds microscopic suspended particles for enhanced filtration. It is a proven choice for maintaining clean circulation lines and equipment, integrating seamlessly alongside chlorine, ozone, or bromine sanitizing systems without destabilizing your target pH 7.2–7.6 or total alkalinity 80–120 ppm.
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Benefits & What Makes It Different
Dual-Action Polymer Shield
Forms an invisible protective barrier on fiberglass, vinyl, plaster, and acrylic surfaces to stop calcium and metal scaling.
Broad Sanitizer Stability
Functions reliably alongside bromine, chlorine, mineral, and saltwater setups without foaming or breaking down active residuals.
Filtration Enhancer
Coagulates ultrafine particles so filter media can capture suspended debris before water clarity degrades.
Product Details
Polymeric Sequestering and Clarifying Polymer Blend
Initial treatment: 16 fl oz per 10,000 gallons (or 2 fl oz per 500 gallons for spas); Weekly maintenance: 1 to 2 fl oz per 500 gallons.
Compatibility
- Compatible with chlorine, bromine, saltwater, mineral, and ozone systems
- Safe for all interior finishes including plaster, tile, vinyl, fiberglass, and spa acrylic
- Do not pre-mix directly with concentrated sanitizers or acids prior to broadcasting
When To Use This
Pro Tip
In regions with elevated tap-water mineral content, add Sirona Defend immediately upon filling before balancing calcium hardness into the ideal 200–400 ppm range to prevent sudden mineral precipitation.
Common Questions & Instructions
Will Sirona Defend interfere with my sanitizer or water balance?
No, Sirona Defend is non-foaming and neutral to your baseline chemistry, meaning it will not alter pH 7.2–7.6, total alkalinity 80–120 ppm, or consume active free chlorine (1–3 ppm) or bromine.
How does Sirona Defend handle high calcium hardness levels?
It sequesters dissolved calcium to prevent precipitation onto heater elements and tile lines, which is especially critical when calcium hardness drifts near or above 200–400 ppm.
How often should Sirona Defend be added to the water?
Apply the recommended maintenance dose on a weekly schedule, after heavy rainfall, or periods of disuse for reliable protection against staining and scaling.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
