4 Things to Know About Using Bleach to Shock a Pool

Only use plain, unscented, non-splashless bleach Any bleach with additives like thickeners, fragrances, or surfactants will mess with your pool’s water chemistry. Check the label carefully before adding it.

You need more bleach than pool shock Regular bleach is about 6% sodium hypochlorite, while pool shock is 10–12%. Use an online calculator to figure out the correct dose for your pool size.

Bleach works for routine shocking, not heavy algae It is fine for bumping up chlorine after rain or routine maintenance. Do not rely on it for a heavy algae bloom.

Freshness matters Bleach degrades over time, especially if stored in a hot garage. This is a good-in-a-pinch move, not a long-term strategy.