HTH 52037R Pool Care Shock Advanced, Swimming Pool Chemical - Cal Hypo Formula, Prevents Bacteria & Algae, Restores Crystal Clear Water - Shock Treatment, 1lb (12 Pack)

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!

Works perfectly in conjunction with my algaecide for periodic quick algae cleanup. At less than $5 per bag, the price is right..

This stuff works great at both treating algae and preventing it. I live in Phoenix AZ so my pool is more like a hot tub right now. The warm water is unfortunately very susceptible to algae growth if you don't stay strictly on top of your chemicals. It clears up the water very good. It hasn't gotten rid of ALL the black algae but it's been stubborn against every product I've used. Pool clears up within 24hours. Not too bad on the chlorine smell. Works for at least the week. Ive been getting better at treating the pool weekly to prevent any algae. Like I said the warm water will let algae grow like crazy if I don't stay on top of it. Not any products fault.

Much cheaper, and lighter, than liquid shock and more potent.

works fine

I was surprised at how quickly and effectively this works. The water was sparkling clear and there was not a heavy scent of chemicals. All algae that had started forming on the bottom was gone, with very little effort from me. Well worth every penny!

Excellent Product at a Great Price!This shock is an amazing value and works exactly as promised. It keeps our pool crystal clear with minimal effort. We’ve tried other brands, but this one stands out for both effectiveness and affordability. I’ll definitely keep buying it!

The HTH shock works so much better than others I have used. It dissolves so much faster its amazing. It keeps my pool crystal clear all season long and just 1 bag a week for upkeep. I have tried many others and they either take forever to dissolve or it seems like i need to use more often. I strongly suggest using HTH for your pool needs its so easy to use.