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HTH

HTH 52038 Swimming Pool Care Green to Blue, Advanced Shock System, 2-Step Swimming Pool Care Solution, 1 Kit

  • Based on 1,969 reviews
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Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Thursday, Aug 27
Order within 13 hours and 27 minutes
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Style: Green to Blue


Features

  • BENEFITS: Fight a severe algae bloom and transform your swimming pool water from green to blue in 24 hours with this easy-to-use system
  • EASY TO USE: Simple 2-step system; Pack I is a strong algae-fighting pool shock with Cal Hypo; Pack II is a powerful flocculant that drops particles to floor for easy vacuuming
  • VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula transforms water from green to blue within 24 hours without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
  • COMPATIBLE WITH ALL SWIMMING POOLS: This product is effective for all pool types that can vacuum to waste; Its ideal for vinyl-lined pools and won't fade liners
  • YOU'RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

Description

The HTH 2-Step Green to Blue Swimming Pool System is the perfect solution for fighting a severe algae bloom and transforming your swimming pool water from green to blue in just 24 hours. This easy-to-use system includes Pack I, which is a strong algae-fighting pool shock with Cal Hypo, and Pack II, a powerful flocculant that drops particles to the floor for easy vacuuming. The Cal Hypo based formula transforms water from green to blue within 24 hours without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock, giving you a visibly brilliant sparkle. This product is effective for all pool types that can vacuum to waste, making it ideal for vinyl-lined pools that won't fade liners. For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly. With the HTH 2-Step Green to Blue Swimming Pool System, you're all clear for a summer full of fun, relaxation, and crystal clear swimming pool water.

Brand: HTH


Item Weight: 7.2 Pounds


Item Form: Powder


Product Benefits: Controls Algae


UPC:


Brand Name: HTH


UPC: 073187520388


Number of Items: 1


Unit Count: 115.2 Ounce


Model Number: 52038


Manufacturer Part Number: 52038


Manufacturer: Innovative Water Care


Item Type Name: 2-Step Swimming Pool Care Solution


Included Components: HTH 52038 Swimming Pool Care Green to Blue


Manufacturer Warranty Description: Warranty


Item Form: Powder


Product Benefits: Controls Algae


Item Weight: 7.2 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Clean the leaves out before you start
Style: Green to Blue
This is my second year using Green To Blue. I was confused about how to use the product the first year. When I was finished it all made sense to me so this year I was much more successful cleaning my pool. I don’t have a pool cover so this is a three step process for me instead of two steps. 1. Prep you pool. By this I mean take your skimmer and clean as much debris, sunken leaves and such, off the bottom as you can. I had a ton of leaves hidden in that green, murky mess. I knew where the leaves collected and swept every day for a week. Because of the murk I never knew what I was going to drag out. The less debris you have the better this product woks. 2. Use the correct amount of shock according to directions on the box and bag. Filter your pool. 3. After the shock is thoroughly mixed in, pour in the clarifier. Recirculate without filtering for an hour. Let it sit still overnight to allow all the particulates to settle to the bottom of the pool. Set the pump to discharge and vacuum your pool. Mine was so bad I had to shock the pool a second time. The pool was cleaner but not clean. I could see all the settled debris and swept the floor again. The fewer leaves in the pool the better the product works. Repeat shocking, vacuuming, and debris removal until your pool is clean. If this seems excessive that is a reflection of the condition of my pool not the product. I think I could have walked in that water. It sparkles now. Oh, the product does not turn your water blue. At least it didn’t turn my water blue. ... show more
Reviewed in the United States on May 19, 2025 by Dave Norris
    • All it needs is 24 hours
Style: Green to Blue
I buy this every dang year. It works so incredibly well. We were struggling trying to get the pool blue and was recommended this product. With in 24 hours it was blue from being so incredibly dirty. It seemed super pricy but I would pay so much more for this kind of cleaner. Do yourself a favor if you’re struggling to get your pool blues, purchase this product ... show more
Reviewed in the United States on February 23, 2026 by J
    • Amazing product!!
Style: Green to Blue
This worked amazingly!! I opened my salt water pool and it was dark green and I couldn’t see the bottom. I debated draining the pool and starting from scratch, but found this and thought I’d give it a try. Followed the directions, and the next morning my pool was so crystal clear, and the algae looked like thick moss at the bottom of the pool. I used a hose to syphon slowly out into the yard. This was my first time using this product, and I’m hooked, I will definitely keep this in my bag of tricks for future pool opening nightmares. Made it so easy to get the pool clean, and ready to go for summer. And I didn’t waste the extra time and money on emptying, scrubbing, refilling, adding salt, and all that garbage. I will definitely be purchasing this again! ... show more
Reviewed in the United States on August 17, 2025 by Vanessa
    • Easy to follow instructions
Style: Green to Blue
Works great cleaner dup out pool after having alot of rain. Easy to follow instructions
Reviewed in the United States on August 23, 2025 by stacy
    • I recommend them and I am going to buy more
Style: Ultra Algaecide
Great product it saves money with others in sale
Reviewed in the United States on January 26, 2026 by Drago
    • Wow. This stuff works.
Style: Green to Blue
Review Image by DebW DebW
This stuff is amazing. First year pool owner met with a full blown algae bloom! My pool water was green. After using this product and following all the directions precisely and vacuuming my pool, my water is crystal clear blue. I hate I had to experience this pool owner dilemma but I’m happy to know there is a product exists when needed! We will need to vacuum again after overnight settling but wow. I will have this product in my pool supplies always. ... show more
Reviewed in the United States on September 28, 2025 by DebW DebW
    • Wow, what a terrible mess!
Style: Green to Blue
Our 25,000 gallon pool started growing algae on the pool walls. I wanted to take quick action as all the grandkids were coming over next week. I evenly applied the 4 packets of "Advanced 1" across the pool, and worked the bottom to ensure all material was dissolved (took about an hour). Then I turned on the recirculation pump and slowly poured the "Advanced 2" packet into the pool skipper as directed. Within 15 minuted the pool pump slowed to 20% due to my 4 large filters being terribly clogged. RESET 1...I stopped the pump, removed the full set of filters, and cleaned each of them with a water jet spray, resealed the filters into their pressure container and reset the pump. RESET 2....Pump pressure and water flow was normal for 30 minutes, then degraded within the hour. I stopped the pump again, removed the full set of filters, and cleaned each of them again. RESET 3....Pump pressure and water flow was normal for first hour, then degraded in 2 hours. yep, had to start all over cleaning out the filters. By now it is getting dark and had to stop for the day DAY 2.....Pool water is still super-cloudy and cannot see bottom drain. Restarted pool pump. It lasted about 2 hours this morning and again clogged. I am hesitant to put in 4 new filters for fear of ruining them as well. So still using my 1-year old filters in hopes of clearing out most of the micro-particulate materials suspended in the water first. Then I will replace filters. I see no improvement in the super-cloudy particulate water but will continue the process. THIS WAS NOT THE PLAN. I only hope I can get the water clear enough for the grandkids this week. The amount of time spent so far is just crazy, and no remedy in sight yet. Some customers are happy, but I will forever AVOID THIS PRODUCT and MANUFACTURER. ... show more
Reviewed in the United States on April 29, 2025 by Pete Blizzard
    • Overnight success!!
Style: Green to Blue
This product is amazing after weeks of trying to get our above ground pool clear when opening it this literally overnight made our water crystal clear and settled the dirt to the bottom to vacuum. Will be opening our pool up with this from now on!!
Reviewed in the United States on November 19, 2025 by Deborah K Sims

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