This ability to control the pH levels from wide swings is known as buffering and resists the dramatic wandering changes when acids or base ( alkali ), chlorine's and other pH altering agents are added, hence when you buy a chemical to control this, it is known as " Buffer ", actually the household term is sodium bicarbonate, a white powder which is generally harmless, easily mixed in a bucket by hand and broadcasted around the pool surface.
Without a correctly balanced total alkalinity in the water, pH bounce can occur, damage can result from the extreme pH swings and can effect all surfaces or equipment, including stainless steel ladders.
The ideal range which Total Alkalinity should sit at when being tested, is between 80 - 120 ppm ( ppm being parts per million ) outside of this range can cause the pH to bounce in varying degree's the lower or higher from these ranges you are.
Another factor which should be considered in balancing Total Alkalinity is the effect of Acids on this.
As acid is introduced to the pool water to bring down the pH level as discussed previously, this also in turn lowers the Total Alkalinity level.
So ironically pH and Total Alkalinity are always fluctuating, as either Acid is introduced or Buffer is introduced, this generally means that an amount of each is added to drive them both to neutrality.
Below is a guide as to how much Buffer you should add or Acid to add to balance the Total Alkalinity and pH levels.
Use test strips as a guide also on where the levels are before adding either, or consult your local pool shop.
Next we will discuss Calcium Hardness
The Pool Professor
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