When the sparkling cool water of the garden pool exerts an almost magical attraction for algae, pool owners need to consider the basic chemistry of the pool.
If the TA of the pool is too low, then you should raise total alkalinity promptly. However, care has to be taken; increasing alkalinity in the pool can cause a spike in pool pH. In this tutorial, we’ll see how to increase alkalinity in the pool without raising pool pH.
Why Is the Alkalinity in the Pool Too Low?
If the alkalinity of the pool water in your garden is too low, there can be several reasons. And these always depend a little on external circumstances.
The pH value and the TA value are often, but not necessarily, related to each other.
Therefore, lowering the pH value through, for example, the frequent use of pH-Minus, the occurrence of heavy rains such as acid rain, and too many human body fluids, including urine and sweat, usually also result in low alkalinity.
Furthermore, the increased use of chlorine in tablet form, unlike shock chlorination, is also not beneficial for the TA value of the pool water.
Effects of Too Low TA Value
Local factors always play a decisive role in what the optimal TA value is. But this should be in a range of at least 80 ppm and at most 160 ppm to ensure that the chemical properties of the water are correspondingly stable.
A value below 80 ppm is therefore generally considered to be too low. In a large number of cases, this can have unpleasant side effects, including constant fluctuations in the pH value. This can be followed by infestation with algae, which settle as a greenish area in the swimming pool. You may also experience an increase in corrosion of the built-in materials and pool accessories.
In addition, this so-called condition of acidification of the pool water can cause irritation or burns to the skin, eyes, or on the surfaces that come into contact with the water.
Increasing the Pool TA Value Without Raising the pH: Step-by-step Instructions
Sometimes the pH value could be at an optimal range but with the TA at a low value. Raising the total alkalinity can automatically cause an increase in pool pH alkalinity. However, you can raise TA without affecting the pH by using baking soda or soda bicarbonate. Follow the instructions below to proceed.
Step 1: Measure pool alkalinity
There are a couple of different methods to determine the TA value of the pool water. These depend on the one hand on a personal preference and the other hand also on the desired financial expenditure for the purchase.
To be able to measure the pool alkalinity as precisely as possible, you can use simple test strips, specially assembled kits, or digital measuring devices that display the result on a screen.
If the determined TA value is below 80 ppm (parts per million or milligrams per liter), it is necessary to increase it immediately.
Step 2: Decide on a product
Various aids are available to increase the alkalinity of the water in a pool. A mostly cheaper variant is the use of pure sodium bicarbonate in the form of baking soda. When you use baking soda to raise your pool alkalinity, the pH value will not be affected.
Step 3: Calculate the Required Amount
It is often necessary to determine the volume of the swimming pool to calculate the amount of chemicals needed. Usually, around 180 to 300 grams of sodium bicarbonate per 10 cubic meters of pool volume increase the alkalinity or the TA value by around 10 to 20 ppm.
If there are special circumstances such as unusual weather conditions or the like, it is advisable to discuss this with other pool owners or a specialist.
Step 4: Prepare the Product
In most cases, a bucket that has been cleaned of foreign bodies is sufficient to dissolve the soda powder before adding it to the pool water.
Although some products can be added to pool water in their pure form, this is usually not recommended.
It’s why you should consult the manufacturer’s instructions before performing this step to avoid damage to the components of the swimming pool.
Step 5: Add the Product to The Water
The addition of the diluted soda should always go hand in hand with the running of the filter pump. The pool pump has to run for several hours so that the chemical agent is sufficiently distributed in the pool.
It is also advisable to add sodium bicarbonate slowly and at different points in the pool water.
Baking Soda Isn’t Limited to Pastry-making!
To ensure the properties of the pool water remain at a stable level so that there are no undesirable side effects such as algae in the pool, it is important to restore a TA value that is too low. Baking soda or sodium bicarbonate is the best chemical for increasing alkalinity without raising pool pH. Take into account the steps in the article and retest your pool water. By doing this, nothing will stand in the way of summer bathing fun in a clean, cool, and safe swimming pool.