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!

This is our first year having a pool. After trying several different shocks we settled on HTH Ultra Pool Shock.The product dissolves quickly and doesn’t leave behind any residue or cloudy water like some cheaper shock treatments I’ve tried in the past. Within a few hours of application, the water looks noticeably clearer, and it does a great job of eliminating that faint “chlorine smell” and any algae or bacteria growth.I also appreciate that the dosing instructions are straightforward, so there’s no guessing game when treating different pool sizes. One packet is usually enough to restore balance after a heavy swim day, rainstorm, or when the water just starts to look a little dull. It gives me peace of mind knowing that my family is swimming in clean, well-sanitized water.Overall, HTH Ultra Pool Shock is reliable, effective, and worth the price for the results you get. If you want a hassle-free way to maintain crystal-clear water, I highly recommend it.

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!

Cleans water great, read instructions and use it at night. (If you have any above ground pool, use it in two separate sessions to avoid damaging the plastic of the pool) Makes sure you have your sand filter running for 8 hours while cleaning it with the powder. It is super easy to use. But please be careful and read your Ph Levels. Wait 12 hours after usage to be able to use the pool.

This HTH Pool Care Shock is a bit on the pricey side, but it definitely works. It clears up cloudy water quickly and keeps the pool sparkling clean. I also like that it comes in pre-measured “pill” style packets—it makes dosing simple and less messy.I prefer buying these kinds of products in bulk/wholesale since I go through them regularly, but overall this is an effective and reliable pool shock.

I love this stuff. It works better than Leslie’s shock I normally use, and makes my pool sparkle at more than half the price of the other stuff. It also works better on preventing algae startup. Two thumbs up!

I recently tried the Shock Advanced for my pool, and I’m really impressed. It works incredibly fast to clear up the water and eliminate any cloudiness. The instructions were easy to follow, and I noticed a difference within just a few hours. Plus, it didn't leave any strong chemical smell, which is a big bonus. Overall, if you need a reliable pool shock that does the job quickly, this is a fantastic choice.

This pool shock is my go to for pool season. The price is great and it works well. It clears the green with consistent use. I use it weekly and usually on Monday since you can’t get in the water until it levels out.