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Alkalinity - 1 kg

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Alkalinity is used to stabilize pH and reduce pH fluctuations. It increases the effectiveness of chlorine and can also be used in chlorine-free treatments.
Due to the use of water heating and disinfectants, alkalinity in water may decrease, leading to pH fluctuations. The recommended alkalinity of pool water is 80 - 175 g/m3 CaCO3.

It represents a collection of basic substances dissolved in water that prevent sudden pH changes. The optimal value of total alkalinity ranges from 80 to 120 mg/l. It affects the effectiveness of disinfection, pH adjustment, formation of precipitates from water, and corrosion of metal components.

If the total alkalinity (CA) is too high, the pH tends to be high and exhibits high stability - it has high buffering capacity. If CA is too low, pH is not stable and experiences frequent fluctuations.

But the most interesting is the bicarbonate anion, which can either donate a hydrogen ion (acting as an acid) or accept a hydrogen ion (acting as a base). The bicarbonate anion can neutralize both acid and base inputs, resulting in no change in pH.

Therefore, high total alkalinity is caused by a high content of bicarbonate anions. Water with high CA has a high neutralization capacity and it is very difficult to change its pH. First, it is necessary to consume and neutralize the bicarbonate anions present in the water, and then the pH starts to change. Water with high CA generally has high pH, which is difficult to adjust. In such cases, the consumption of acid and disinfectant increases because, as mentioned before, the effectiveness of chlorine significantly decreases at higher pH.

Low total alkalinity means that there are few bicarbonate ions in the water. In such cases, even a very small dose of the corresponding preparation is sufficient to dramatically reduce or increase the pH. In our conditions, the optimal value of total alkalinity ranges from 80 to 120 mg/l as CaCO3 (calcium carbonate).

Testers are available to measure total alkalinity, but more accurate measurement can be done using advanced photometers.


This product has 12 month warranty. In the event of a product breakdown within the warranty period, you should contact us as soon as possible.

The Buyer has the right to make his defective goods claim within 12 months of accepting the goods. If a defect manifests itself within six months of the Buyer accepting the goods, such goods are presumed to be defective at acceptance unless the Seller proves otherwise.


Should you require any further information, please email where we will respond to your request quickly.

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This product is in stock at our warehouse and is ready for Standard or Express delivery Service.

Delivery – Mainland UK

Delivery Times: - Standard delivery: 1-2 weeks

Most of our products, when ordered by 12 PM  Monday to Friday, will be dispatched for next-day delivery . In cases where items are not in stock or are special orders, delivery times may be longer.

Rest assured, we will contact you beforehand to provide an estimated delivery date.

If you have specific delivery instructions, such as gifting or a required delivery date, please include them in your order.

 If your billing address is different from the delivery address, you can provide the latter separately in the order form. We will accommodate the delivery address if possible under contractual conditions.

Please note that some areas of Scotland, Northern Ireland, the Isle of Man, and the Isle of Wight may incur extra carriage charges.

Please check your delivery

If you sign for a delivery as "OK" and later discover that it's damaged, our carriers will not accept liability, and you may be charged for the damaged items. In such cases, we will make a delivery charge for replacement items.

Please sign for your delivery as "UNCHECKED" if you're unable to thoroughly check it upon receipt. If there is any damage to the package, no matter how small, please sign for it as "DAMAGED". We cannot make claims for any damaged items that haven't been signed for as "UNCHECKED" or "DAMAGED".

If you sign for your goods as "DAMAGED", please notify us within 72 hours by email at

More information Terms and conditions

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