You might think your pool's just a big bathtub, but without the right calcium balance, it's more of a money pit. You're no stranger to the pool care dance—skimming, vacuuming, and pH balancing.

But let's talk about the unsung hero of pool maintenance: the Pool Hardness Increaser. You need it when your water's too soft, threatening to eat away at your pool's soul, er, surfaces. By boosting calcium hardness, you protect the pool's interior from corrosion and ensure swimmers aren't enjoying a dip in what could double as a dilute acid bath.

Add it to your routine, and keep your pool's skeleton—its gleaming floors and walls—strong and intact.



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Pool Hardness Increaser

Understanding Calcium Hardness

You'll need a specific amount of calcium hardness in your pool water to prevent damage to pool surfaces, such as etching of concrete pool floors and walls. When the water becomes too soft, the pool's concrete surfaces can deteriorate, leading to costly repairs down the line.

To ensure you're in the safe zone, conduct a pool calcium test regularly. If you find your pool water hard, it might be a sign that there's too much calcium in the water. Conversely, if the calcium water levels are too low, you'll need to add a hardness increaser to balance things out.

Effects on Pool Surfaces

Amidst maintaining your pool's chemical balance, it's crucial to consider how varying levels of calcium hardness can impact the integrity of concrete pool surfaces. If the hardness level in your pool is too low, the water may become corrosive, leading to the etching of your pool floor and walls. This can cause significant damage over time.

Conversely, too much calcium hardness can leave deposits on your pool surfaces and equipment, such as filters and heaters.

To safeguard your concrete pools, aim to adjust the hardness by 10ppm at a time to prevent sudden changes that could harm the pool's surfaces. Regularly using a pool hardness increaser helps maintain crystal waters and protects against the deterioration of your swimming pool's concrete surfaces.

Balancing Pool Water Chemistry

How do you maintain the delicate balance of your pool's water chemistry while ensuring the longevity of your pool equipment and surfaces?

It's crucial to keep an eye on the calcium hardness level in your pool water. For concrete pools and tiled pools alike, the right level of calcium hardness prevents etching of pool floors and walls.

If your pool has a vinyl or fibreglass liner, the calcium hardness level should be between 175 parts per million (ppm) and 225 ppm. If you have a concrete or plaster pool, keep the level between 200 ppm and 275 ppm. If the calcium hardness level in your pool gets too high, the water will be hard. The first indication will likely be a cloudy pool. On the other hand, too-soft water will be corrosive to your pool. 

If hardness in swimming pools is too low, you'll need a pool hardness increaser to bump it up, ideally increasing hardness by 10ppm at a time to avoid overshooting the recommended range.

Remember, every litre pool volume counts when adding chemicals. Keep pool filters, cleaners, and other equipment in mind, as imbalanced water can lead to costly repairs.

Regular testing and adjusting ensure crystal waters and a durable swimming environment.

Choosing the Right Increaser

Selecting the appropriate pool hardness increaser is crucial for maintaining the optimal calcium hardness level and protecting your pool surfaces. When you have concrete pools or tiled pools, it's especially important to prevent etching of the pool floor and walls.

Look for a product that specifically targets the level of calcium hardness, aiming to increase hardness by 10ppm increments to avoid overshooting the ideal range. Crystal Waters Pool Hardness Increaser, for example, is formulated to safely and effectively manage hardness in swimming pools. Always read labels to ensure compatibility with your pool equipment, including filters and cleaners.

Application and Dosage Tips

Why is it essential to apply the correct dosage of pool hardness increaser to maintain your swimming pool's water balance?

Getting the dosage right matters because it prevents damage to your pool surfaces and equipment.

Too little, and you risk the etching of your pool floor, especially in concrete pools.

Too much, and you could end up with cloudy water and scale build-up.

For most products, such as Crystal Waters Pool Hardness Increaser, you'll typically need to increase hardness by 10ppm for every 10,000 litres of pool water.

Always check the instructions specific to your product.

Dissolve the increaser in a bucket of water first, then distribute it evenly around your pool while the filter is running.

Remember to retest your pool water after application to ensure the hardness level is within the ideal range.

Frequently Asked Questions

What are the long-term effects of not adjusting the hardness level in a pool?

If you don't adjust your pool's hardness level, over time, the water can corrode concrete surfaces or cause etching on the pool floor. Your pool equipment, like filters and heaters, might suffer too.

In concrete pools, low calcium hardness leads to damage, while high levels cause scaling. It's crucial to keep hardness within the recommended range to protect your pool's surfaces and ensure crystal waters for swimming.

What happens over several seasons or years if the hardness in pool water is consistently ignored?

If you neglect your pool's calcium hardness over time, you're risking permanent damage.

Etching of pool floors can become a costly issue, and your pool equipment may suffer too.

Ignoring these levels doesn't just affect concrete pools; tiled and other types of pools are at risk as well.

Without proper maintenance, you could end up spending a lot more on repairs than on preventive care.

Keep an eye on that hardness level!

How do hardness increasers interact with other pool chemicals?

You'll find that adding chemicals to your pool is all about balance. When you increase the hardness, it affects how other pool chemicals perform.

Specifically, the calcium hardness level interacts with chlorine, stabilizers, and pH adjustors, ensuring your pool water stays clear and prevents damage to surfaces.

Always follow the recommended dosages to avoid conflicts between chemicals and maintain a healthy swimming environment.

How adding a hardness increaser affects the overall chemical balance of their pool water and how it might interact with other pool chemicals such as algaecides, clarifiers, or pool cleaners?

You're diving into how chemicals mingle in your pool water, beyond just tweaking calcium hardness. Adding a hardness increaser does more than up the calcium—it can affect the synergy between algaecides, clarifiers, and cleaners.

You'll need to monitor not just the hardness by 10ppm increments but also keep an eye on how it plays with other essentials to keep your concrete or tiled pool surfaces safe from etching and your waters crystal clear.

Explore More with Aquaneo

Extending Beyond Calcium Testing While maintaining perfect calcium hardness levels is essential for a crystal-clear pool, extending your pool care to other areas is equally important. Aquaneo offers a wide range of products to ensure your pool remains in top condition. From chlorine feeders to ensure proper chlorine levels to chlorine reducers for balancing your pool chemistry, Aquaneo's extensive spa chemicals and premium spa chemicals cater to all your needs. Our clarifiers and flocculants keep your pool water sparkling clean, while pH reducers help in maintaining a safe swimming environment. Additionally, our sanitizers are essential for a hygienic pool, and our pool nets and salt chlorinator cells make pool upkeep straightforward and efficient. With a comprehensive range of pool light options and spare parts for pool equipment and robotic pool cleaners, Aquaneo is your one-stop-shop for all pool and spa needs. Visit us for a world-class retail experience and ensure your pool or spa is perfectly maintained for a memorable swimming experience.


You've got the lowdown on calcium hardness and its impact on your pool's health. Now, pick the right increaser and follow the dosage advice closely.

Remember, keeping that hardness in check is your ticket to a pristine, damage-free pool. So, stay vigilant, treat your pool with care, and dive into that crystal-clear water with peace of mind.

It's all in your hands to maintain that perfect swim sanctuary. Happy swimming!

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