HTH 52031 Swimming Pool Care Shock, Swimming Pool Chlorinator Boosts Chlorine Levels, Cal Hypo Formula, 13.3oz

This stuff works! makes life easy and water clear and clean. I don't smell anything, but my pool is outdoor and not indoor so there's that. I say this is quality stuff for sure. Granted i still needed some clorox for pool and spa and some muriatic acid and some baking soda to level things out. But after things are within range, and this is dissolved, separately, just dump it right into the filter stream and let it go. After 4 hr for my little 800 gal pool, it's clear and purrfect to play in!

It works perfectly to keep my pool clean

I had this stubborn black mold looking stuff in the rubber seal around my washing machine from previous owners. I had tried everything!! Bleach, vinegar/baking soda, intense scrubbing, endless cleaning cycles, the tablets made for cleaning washing machines, etc. Nothing worked. This stuff did. Obviously be careful though, it's very potent.

Title: Keeps My Pool Crystal Clear and Sparkling! This HTH pool shock works great! It clears up cloudy water fast and keeps the pool looking clean and fresh. Super easy to use — just pour it in at night, and by the next morning the water looks amazing. It dissolves quickly with no residue or strong chlorine smell. I use it weekly, and it really helps keep algae away. Excellent product and great value for regular pool maintenance!

The HTH 52036R Pool Care Shock Advanced has become my go-to solution for keeping our hot tub water clean, clear, and safe all year long. This 6-pack is a fantastic value, and the calcium hypochlorite (cal-hypo) formula really does the job. Fast-Acting Shock Treatment: Within just a few hours of applying, the water goes from cloudy or dull to sparkling clean. It clears up algae and cloudy water impressively fast. Kills Bacteria & Prevents Algae: I’ve had issues with algae growth in the past, especially during hot, humid weeks. This shock keeps that completely under control. It also gives peace of mind that bacteria are being eliminated regularly. Each packet is pre-measured and dissolves quickly without leaving residue. No complicated mixing or measuring—just pour directly into the pool. The HTH Shock Advanced is a powerful and convenient way to maintain a clean and healthy pool. It restores clarity, controls algae and bacteria, and is very user-friendly. A pool care essential—I always keep a box on hand!