If you own a pool, you know how important it is to keep the water chemistry balanced. One of the key factors that affects the water quality is the alkalinity level, which measures the amount of alkaline substances in the water. Alkalinity acts as a buffer that prevents the pH level from fluctuating too much. The ideal range for alkalinity is between 80 and 120 parts per million (ppm). If the alkalinity level is too low, it can cause problems such as:
- pH bounce: The pH level can swing from acidic to alkaline, making it hard to maintain a stable and comfortable water condition.
- Irritation: Low alkalinity can make the water acidic, which can irritate the eyes, skin, and respiratory system of swimmers.
- Damage: Low alkalinity can corrode the pool surfaces and equipment, causing etching, staining, cracking, and rusting.
To avoid these issues, you need to raise the alkalinity level in your pool when it drops below 80 ppm. In this article, we will show you two easy methods to do that using common household products: baking soda and soda ash.
Method 1: Use Baking Soda
Baking soda, or sodium bicarbonate, is a cheap and effective way to raise the alkalinity level in your pool. Baking soda will increase the bicarbonate level in the water, which is the main component of alkalinity. However, baking soda will also slightly raise the pH level, so you need to monitor both parameters when using this method.
To use baking soda to raise the alkalinity level in your pool, follow these steps:
- Test the water using a pool testing kit to measure the current alkalinity and pH levels. You can find pool testing kits at any pool supply store or online.
- Calculate how much baking soda you need to add to your pool. The general rule is to add 24 oz (680 g) of baking soda per 10,000 gallons (37,854 L) of water to raise the alkalinity by 10 ppm. You can use an online calculator to help you with this step.
- Turn on the pool pump and filter system to circulate the water.
- Add the baking soda slowly and evenly around the perimeter of the pool. Avoid dumping large amounts in one spot as this can create cloudy water.
- Wait for at least six hours before testing the water again. If the alkalinity level is still below 80 ppm, repeat steps 2 to 4 until you reach the desired level.
Method 2: Use Soda Ash
Soda ash, or sodium carbonate, is another product that can raise the alkalinity level in your pool. Soda ash will increase the carbonate level in the water, which is another component of alkalinity. However, soda ash will also significantly raise the pH level, so you need to be careful not to overshoot your target.
To use soda ash to raise the alkalinity level in your pool, follow these steps:
- Test the water using a pool testing kit to measure the current alkalinity and pH levels.
- Calculate how much soda ash you need to add to your pool. The general rule is to add 6 oz (170 g) of soda ash per 10,000 gallons (37,854 L) of water to raise the pH by 0.2. Since raising the pH will also raise the alkalinity, you need to factor in both parameters when using this method.
- Turn on the pool pump and filter system to circulate the water.
- Add the soda ash slowly and evenly around the perimeter of the pool. Avoid dumping large amounts in one spot as this can create cloudy water.
- Wait for at least six hours before testing the water again. If the alkalinity level is still below 80 ppm or if the pH level is too high, adjust accordingly using more soda ash or a pH reducer.
How to Maintain Alkalinity Level in Your Pool
Once you have raised the alkalinity level in your pool to within the ideal range of 80 to 120 ppm, you need to maintain it by testing and adjusting it regularly. Here are some tips on how to do that:
- Test your pool water at least once a week using a pool testing kit. You can also use test strips or digital testers for a quick check.
- Monitor your pH level as well as your alkalinity level. The ideal range for pH is between 7.2 and 7.8. If your pH level is too high or too low, it can affect your alkalinity level as well.
- Use chlorine tablets or granules that have a neutral or high pH level. Some chlorine products have a low pH level that can lower your alkalinity level over time.
- Avoid adding too much water to your pool. Adding fresh water can dilute your alkalinity level and make it drop. If you need to add water, do it gradually and test the water afterward.
- Avoid using acidic products in your pool. Some pool cleaners, algaecides, and stain removers have a low pH level that can lower your alkalinity level. If you need to use them, follow the instructions carefully and test the water afterward.
Warnings
- Always wear protective gloves and goggles when handling pool chemicals. Avoid contact with skin, eyes, and clothing. Wash your hands thoroughly after use.
- Store pool chemicals in a cool, dry, and well-ventilated place. Keep them away from children, pets, and fire sources. Follow the manufacturer’s instructions for safe storage and disposal.
- Do not mix pool chemicals together or with other substances. This can cause dangerous reactions that can release toxic gases or cause explosions.
- Do not swim in your pool until the water is clear and balanced. Wait for at least six hours after adding any chemicals to your pool before swimming.