Liquid (muriatic acid) or dry granular (sodium bisulfate) substance used to lower the pool's pH (toward a more acidic condition) or to lower total alkalinity levels.
The amount of acid required to lower the pH and total alkalinity of pool water to the correct level. A titration test is used to determine proper amounts of acid (or pH decreaser) to reach correct levels. For example, to lower pH from 8.0 to 7.6, your pool may demand 2qts. of acid.
Located on the top of the filter and sometimes accompanied by a pressure gauge, the bleeder is opened to release air trapped in the filter.
Over 20,000 species known to exist. Algae may form on your pool surfaces or it may bloom in suspension. We typically know algae to be green but it may also be yellow (mustard algae), black, blue-green, or any shade in between. It may form separate spots or seem to grow in sheets. Pink algae are not algae at all but a form of bacteria. Algae are living breathing organisms that need warmth, sunlight, and CO² to thrive. Because of their effect on pool sanitation and appearance, their presence is more objectionable than pathogenic.
Meaning, to kill algae. Algaecides perform best as a backup to a routine sanitation program. They also help to kill airborne spores as they blow into the pool. A variety of algae treatment products are available including copper and silver compounds, poly-quat compounds, chlorine enhancers, and herbicides.
An algaecide kills algae, while an algaestat retards and prevents its genesis and growth.
Alkali are best known for being bases (compounds with pH greater than 7) that dissolve in water. Alkaline is commonly used as a synonym for base, especially for soluble bases.
Alkaline refers to the condition where the water's pH is above 7.0 (neutral) on the pH scale. It is the opposite of acidic. Total Alkalinity is the amount of carbonates, bicarbonates, and hydroxides in the water, measured in parts per million CaCO3 (ppm) of Total Alkalinity.
Also known as alum, this product is used as a flocculent which attracts suspended particles in the water together (green or cloudy pools). Alum sinks everything to the bottom, which is then vacuumed to waste. A small amount of alum can also be used as a sand filter additive.
An ion with net negative charge, having more electrons than protons. In electrolysis, anions migrate to a positively charged anode.
A device which agitates or vacuums debris from the walls and floor of the pool.