SpaGuard Spa Shock-Oxidizer - 35 oz.
SpaGuard Spa Shock-Oxidizer is a fast-dissolving, non-chlorine shock that clears spa and hot tub water by destroying the organic waste your sanitizer leaves behind. Every soak adds body oils, lotions, sweat, and other contaminants to the water. Sanitizer controls bacteria, but it doesn't burn off that organic load — and when it builds up, the water turns cloudy, dull, and starts to smell. Shocking is how you oxidize that buildup away.
What sets this shock apart is what it doesn't do: it doesn't raise your chlorine residual. Built on a non-chlorine oxidizer (potassium peroxymonosulfate, or MPS), it clears the water without adding chlorine — so there's no chlorine spike to wait out and no sharp chlorine smell after dosing. It also buffers the water to prevent pH bounce, so a routine shock doesn't knock your balance out of range.
Regular use keeps water consistently clear and comfortable. It's a clean, simple way to oxidize between sanitizer doses, and it works with whatever system you run.
SpaGuard®
SpaGuard® Brand FAQs
What is SpaGuard?
SpaGuard is a professional-grade brand of spa and hot tub water care products — sanitizers, shocks, balancers, and water enhancers — formulated specifically for spas rather than adapted from pool chemicals. The line is designed to work together as a complete system for clean, clear, comfortable water.
Who makes SpaGuard?
SpaGuard is part of the BioGuard family of water care brands, a long-established name in pool and spa chemistry. That backing means the formulas are professionally developed and tested, with a reputation built over decades in the industry.
What water care systems does SpaGuard offer?
SpaGuard supports three complete care methods: a chlorine system, a bromine system, and the Soft Soak TRIO system. Each is a coordinated set of products, so you can match your routine to the sanitizer you prefer.
What makes SpaGuard different from generic spa chemicals?
SpaGuard products are engineered for the unique demands of hot, agitated, heavily used spa water, and they're built to work together as a system. That coordination delivers more reliable, repeatable results than mixing unrelated single products.
What is ALEX water testing?
ALEX is SpaGuard's exclusive computerized water-analysis tool used by its dealers. A quick water sample produces a precise read on your spa's chemistry and a tailored recommendation, taking the guesswork out of what to add and when.
Why buy SpaGuard from an authorized dealer?
SpaGuard dealers are trained on the brand's products and water-care technology, so you get expert advice alongside genuine product. They can run an ALEX analysis, troubleshoot issues, and recommend exactly what your water needs.
About SpaGuard®
SpaGuard is a professional-grade line of spa and hot tub water care products engineered specifically for spas — not pool chemicals repackaged for a smaller tub. Built around a simple, proven approach (balance the water, sanitize it, shock it, and keep it clear), SpaGuard products are formulated to work together as a system across three care methods: chlorine, bromine, and the Soft Soak TRIO system.
Because the formulas are made for the unique demands of hot, agitated, heavily used spa water, owners get reliable, repeatable results with less guesswork. SpaGuard is also backed by a trained dealer network and ALEX water-analysis tools, so when a water issue does come up, there's an expert-tested path to fixing it. It's a trusted choice for anyone who wants clean, comfortable, sparkling water with a maintenance routine they can actually keep up with.
