Hot tub shock comes in two types: non-chlorine (MPS) and chlorine-based. Each does a different job. Knowing which one to reach for – and when – saves you cloudy water, skin irritation, and wasted product. This post breaks down both types clearly.
Hot tub owners often grab whichever shock is on the shelf without knowing there’s a real difference. Non-chlorine shock oxidizes contaminants and lets you soak sooner. Chlorine shock kills bacteria and is the right call when your water is genuinely compromised. Knowing which to use – and when – saves you a lot of frustration.
Not all hot tub shock is the same, and grabbing the wrong one can make your water worse. This guide breaks down exactly when to use non-chlorine shock versus chlorine shock, how much to add, and what each one actually does to your water.