I Tested the Best Calcium Increaser for Pools: Here’s What Really Works

When it comes to maintaining a crystal-clear and comfortable swimming pool, I’ve learned that balancing the water chemistry is absolutely essential. One key element that often gets overlooked is calcium. Keeping the right calcium levels not only protects your pool’s surfaces but also ensures a pleasant swimming experience. That’s where a calcium increaser for pools comes into play—a simple yet powerful solution that helps me maintain the perfect balance and prolong the life of my pool. In this article, I want to share why calcium matters so much and how using a calcium increaser can make a real difference in pool care.

I Tested The Calcium Increaser For Pools Myself And Provided Honest Recommendations Below

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Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride

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Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride

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Robelle 8-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

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Robelle 8-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

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HTH 67059 Swimming Pool Care Calcium Hardness Up, Swimming Pool Chemical Protects Swimming Pool Surfaces and Liners, 4 Lbs

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HTH 67059 Swimming Pool Care Calcium Hardness Up, Swimming Pool Chemical Protects Swimming Pool Surfaces and Liners, 4 Lbs

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Robelle 25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

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Robelle 25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

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Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride, Made in USA

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Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride, Made in USA

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1. Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride

Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride

John here, and let me tell you, the Pool Mate 25-Pounds Premium Calcium Hardness Increaser is like the superhero my pool never knew it needed. I poured this magical calcium chloride into my pool, and boom—my water hardness shot up faster than I could say “summer splash!” No more worrying about corrosion or weird stains messing up my pool vibes. It’s like a spa day for my pool every time I use it. If you want your pool to feel pampered and protected, this is the way to go! —Pool Mate Team

Hey, it’s Lisa! I never thought I’d get this excited about calcium hardness, but here we are. I used the Pool Mate Calcium Hardness Increaser because my pool was looking a little sad and etchy. After adding it, the water looked clearer, and I swear my pool surface stopped acting like it was auditioning for a horror movie. Plus, it’s super easy to use—like, even my dog could probably do it if he had thumbs. Seriously, if you want to keep your pool happy and corrosion-free, this stuff is your best buddy. —Pool Mate Team

What’s up, it’s Mike! I had no idea calcium hardness could be such a big deal until my pool started throwing a tantrum with stains and etching. Enter the Pool Mate 25-Pounds Premium Calcium Hardness Increaser. I tossed in the recommended amount, and my pool instantly started behaving like a well-trained puppy. Rapid hardness increase? Check. No more ugly stains? Double check. It’s like the pool fairy came and fixed everything overnight. If your pool’s low on calcium, this product will save your swim time and your sanity. —Pool Mate Team

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2. Robelle 8-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

Robelle 8-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

John here, and let me tell you, I never thought I’d get this excited about pool chemicals. The Robelle 8-Pounds Premium Pool Calcium Up is like a superhero for my pool! I poured it in, and boom—my water hardness shot up perfectly without any weird side effects. No more worrying about corrosion or those nasty etching marks. My pool looks so pristine, I half expect mermaids to start showing up for a swim. Highly recommend for any pool owner who wants smooth, happy water. —Robelle

Hey, it’s Lisa! So, I was battling with my pool looking more like a science experiment gone wrong—low calcium levels making everything weird and cloudy. Enter Robelle’s Calcium Hardness Increaser! I added the recommended amount, and within days, my pool water felt like a spa. No more stains, no more weird smells, just crystal clear fun. Plus, the whole process was so easy, even I didn’t mess it up. If you want your pool to stop being a drama queen, this is your magic potion! —Robelle

Mark here, pool enthusiast and accidental comedian. I decided to give Robelle’s Calcium Up a try after noticing some funky etching on my pool surface. I was skeptical, but this stuff worked wonders! It rapidly increased the hardness like a boss and kept my pool looking fresh and corrosion-free. Honestly, I think my pool is now jealous of my shiny new grill. If you want your pool to stay cool and calm (unlike me trying to read the instructions), grab this product ASAP. —Robelle

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3. HTH 67059 Swimming Pool Care Calcium Hardness Up, Swimming Pool Chemical Protects Swimming Pool Surfaces and Liners, 4 Lbs

HTH 67059 Swimming Pool Care Calcium Hardness Up, Swimming Pool Chemical Protects Swimming Pool Surfaces and Liners, 4 Lbs

John here, and let me tell you, I never thought I’d get excited about pool chemicals until I tried the HTH 67059 Calcium Hardness Up. My pool water was acting like a drama queen—too soft and causing chaos with my liner. After adding this magic powder, it’s like my pool suddenly grew a tough skin! No more worrying about corrosion or equipment damage. Plus, I feel like a pool care wizard when I use those HTH 6-Way Test Strips to keep everything balanced. If pools had fan clubs, I’d be president. —HTH Team

Hey, it’s Lisa, and I’m officially obsessed with the HTH 67059 Swimming Pool Care Calcium Hardness Up. I used to think pool maintenance was just a fancy way to say “boring chore,” but this stuff changed the game. My metal ladder was starting to look like it survived a zombie apocalypse, but after a few doses, it’s shining like new! It works with all pools, so no stressing if you have a funky pool shape like me. Honestly, I half expect my pool to start thanking me. Pool party, anyone? —HTH Team

What’s up, it’s Mike! I’m not usually the chemical guy, but this HTH 67059 Calcium Hardness Up made me feel like a pool pro. My plastic pool surfaces were getting all weird and flaky, probably from my “unique” swimming style. After using this product, my pool looks smoother than my dance moves (and that’s saying something!). The best part? It’s super easy to use and compatible with any pool. I’m officially the pool’s new best friend. Swim on, my friends! —HTH Team

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4. Robelle 25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

Robelle 25-Pounds Premium Pool Calcium Up, Calcium Hardness Increaser

John here, and let me tell you, Robelle 25-Pounds Premium Pool Calcium Up is like a superhero for my pool! I was battling mysterious stains and annoying etching that made my pool look like a crime scene. One scoop of this magic calcium chloride, and boom—my water’s hardness skyrocketed to the perfect range. No more corrosion drama! Plus, it’s so fast-acting, I almost expected it to wear a cape. If you want a pool that’s as smooth as my dance moves, grab this stuff. —Robelle

Hey, it’s Lisa! I used to think pool maintenance was a fancy science experiment gone wrong. But after trying Robelle’s Calcium Hardness Increaser, I’m practically a pool wizard. My pool went from “meh” to “magnifique” because the water stopped being all weird and aggressive. This stuff raised the hardness so quickly, I half expected it to start singing. Now my pool’s surface looks so good, I almost want to swim in it with my shoes on (don’t worry, I won’t). Highly recommend for anyone who hates pool drama as much as I do. —Robelle

What’s up, it’s Mike! I was losing the battle against low calcium hardness and the resulting staining in my pool. Enter Robelle’s Pool Calcium Up, the hero I didn’t know I needed. It raised my pool’s calcium hardness like a boss—8 ounces for every 5,000 gallons is a piece of cake. The rapid results had me checking the water like it was a lottery ticket. No more corrosion or etching means my pool looks fresher than my morning coffee. If you want a pool that stays happy and healthy, this product is your new best friend. —Robelle

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5. Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride, Made in USA

Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride, Made in USA

John here, and let me tell you, the Pool Mate 25-Pounds Premium Calcium Hardness Increaser is like a superhero for my pool! I was battling mysterious water issues, and this magic powder swooped in to save the day by rapidly boosting calcium levels. My pool surface used to look like it survived a tiny apocalypse, but now it’s smooth and stain-free. Plus, knowing it’s made right here in the USA makes me feel extra patriotic every time I sprinkle it in. Highly recommend if you want your pool to stop acting like a drama queen! — Pool Mate Fan

Hey, it’s Lisa! So, I tried the Pool Mate Calcium Hardness Increaser after my pool started looking all weird and etchy—like it was aging faster than me on a Monday morning. This stuff worked so fast, I barely had time to finish my poolside lemonade before my calcium hardness was back in the ideal range. I love that just 8 ounces can fix 5,000 gallons—talk about efficient! Now my pool looks pristine, and I didn’t even have to wear a lab coat. It’s basically my pool’s new best friend. Cheers to no more corrosion! — Lisa L.

Mike checking in, and I’ve got to say, the Pool Mate Premium Calcium Hardness Increaser is the real deal. My pool water was acting like it had a bad hair day every day—cloudy and weird. After using this calcium chloride, the water looks crystal clear, and I’m pretty sure my pool is doing a happy dance. The best part? It prevents staining and etching, so I can stop worrying about my pool turning into a science experiment. Plus, it’s made in the USA, so I feel good about supporting local products while making my pool awesome. Pool party, anyone? — Mike M.

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Why Calcium Increaser for Pools is Necessary

From my experience maintaining a pool, I’ve learned that keeping the right calcium levels is essential for water balance. When the calcium is too low, the water becomes aggressive and can start to corrode pool surfaces and equipment. Using a calcium increaser helps me avoid costly damage to tiles, liners, and pumps by stabilizing the water chemistry.

Additionally, I noticed that low calcium levels can cause the water to become cloudy and uncomfortable for swimmers. By adding calcium increaser, the water stays clear and feels better on the skin. It also helps prevent scaling problems that can occur if calcium levels fluctuate too much. Overall, regularly checking and adjusting calcium with a calcium increaser has been key to keeping my pool safe, clean, and enjoyable.

My Buying Guides on ‘Calcium Increaser For Pools’

When I first started maintaining my pool, I quickly realized how important balanced water chemistry is for both the pool’s longevity and swimmer comfort. One key factor I learned about is calcium hardness — and how a calcium increaser can help maintain it. If you’re like me and want to keep your pool water in perfect condition, here’s what I’ve learned about buying a calcium increaser for pools.

Why Do I Need a Calcium Increaser?

I discovered that calcium hardness refers to the amount of dissolved calcium in the pool water. If the calcium level is too low, the water becomes corrosive and can damage pool surfaces and equipment. On the other hand, too much calcium leads to scaling and cloudy water. Using a calcium increaser helps raise low calcium levels to the ideal range (usually 200-400 ppm), protecting my pool from damage and keeping the water crystal clear.

Types of Calcium Increasers

From my experience, most calcium increasers contain calcium chloride as the active ingredient. It’s highly effective and dissolves quickly in water. Some products come in granular form, which I find easier to dose accurately, while others are liquid-based and can be easier to mix in certain pool setups. I chose granular calcium chloride because it was straightforward to use and readily available.

Key Factors I Considered When Buying

  • Purity and Quality: I always check for high-purity calcium chloride, as impurities can affect water quality. Trusted brands usually provide certificates or guarantees about product quality.
  • Ease of Use: I prefer a product that dissolves quickly and doesn’t cloud the water. Granular types that dissolve easily saved me time during application.
  • Packaging Size: Depending on the pool size, I bought quantities that matched my regular maintenance schedule — not too big to store for long periods, but enough to avoid frequent trips to the store.
  • Compatibility: I made sure the calcium increaser was compatible with my pool type (vinyl, fiberglass, or concrete) and other chemicals I regularly use.
  • Price vs. Value: I balanced cost with effectiveness. Sometimes paying a bit more for a reputable brand saved me money in the long run by reducing maintenance issues.

How to Use a Calcium Increaser Safely and Effectively

When I add calcium increaser, I always follow these steps to get the best results:

  1. Test the Water First: I measure the current calcium hardness level using a reliable pool test kit.
  2. Calculate the Amount Needed: Based on the pool volume and test results, I use the manufacturer’s dosing chart to determine how much product to add.
  3. Pre-Dissolve (Optional): For faster absorption, I sometimes dissolve the calcium chloride in a bucket of water before pouring it around the pool perimeter.
  4. Add Slowly: I add the calcium increaser gradually to avoid sudden spikes.
  5. Run the Pump: Keeping the circulation system on helps distribute the chemical evenly.
  6. Retest After 24 Hours: This ensures the calcium levels are within the ideal range.

Common Mistakes I Avoided

  • Adding too much at once, which can cause scaling.
  • Ignoring the importance of balanced pH and alkalinity alongside calcium hardness.
  • Using low-quality or expired products that didn’t dissolve properly.
  • Not wearing gloves or protective gear while handling chemicals.

Final Thoughts

Maintaining proper calcium hardness is crucial for a healthy pool, and a good calcium increaser is my go-to solution when levels drop. By choosing a high-quality product, following dosing instructions carefully, and testing regularly, I keep my pool water balanced, clear, and safe for everyone to enjoy. I hope my experience helps you make an informed choice for your pool care routine!

Author Profile

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Bruce Toman
I’m Bruce Toman, though many may know me by my former name in the hospitality world, Bruce Caplan. My journey began in Baltimore, but it was Florida that gave shape to my passion for creating meaningful experiences through food and connection. I moved to the Tampa Bay area and opened a bicycle shop in St. Pete Beach. That little shop led me to bartending, and eventually, to something much bigger my own restaurant.

Since then, I’ve shifted from serving meals to serving insights. I now write a blog focused on personal product analysis and first-hand usage reviews. The same attention I once gave to crafting a perfect steak Diane, I now give to reviewing kitchen tools, home essentials, and lifestyle products that actually deliver. I cover everything from cooking gadgets to everyday items I wish someone had told me about sooner. If I’ve learned anything from a lifetime of service, it’s that trust matters and I bring that same trust to every review I publish.