POOL CHEMICAL GLOSSARY
ALGAE: Tiny plants which grow in the water and can discolor it.
ALGAECIDES: Chemicals which kill algae and prevent new algae growth.
BACTERIA: Microscopic organisms (germs) which can cause illness.
CHELATING AGENTS: Chemicals that combine with dissolved metals to prevent water
CHLORAMINES: The combined form of chlorine after oxidation
of impurities. Cause eye irritation and four chlorine-like odors. This form of
chlorine is not an effective disinfectant.
CHLORINE: The most commonly
used disinfecting agent for swimming pools because it is the best chemical
CHLORINE DEMAND: The materials in the water which use
up chlorine, such as bacteria, algae, dirt, leaves, grass clippings and swimmers
wastes. The chlorine demand must be satisfied before a chlorine residual is
available to disinfect the pool water.
CHLORINE RESIDUAL: The chlorine
level in the water after the chlorine demand has been satisfied. The free
chlorine residual is the true measure of potential chlorine disinfection.
CYANURIC ACID: (See stabilizer. Also called conditioner)
indicator solution used to measure the free chlorine residual.
(Sodium bisulfate) A granular material which is used to lower the pH or total
FREE CHLORINE: Hypochlorous acid or hypochlorite. This is the
active chlorine that kills bacteria and algae and keeps your pool clear and
HARDNESS: The amount of calcium or magnesium dissolved in the
water. High levels contribute to scale deposits.
HYPOCHLOROUS ACID: The
active form of chlorine in water. The material which performs the sanitizing and
oxidizing. (free chlorine)
MURIATIC ACID: A liquid used for lowering pH
or total alkalinity.
OTO: orthotolidine. And outdated indicator solution
that was used to measure the total chlorine residual.
pH: A system for
measuring the acidity/alkalinity of water. Readings above 7 are alkaline;
readings below 7 are acidic.
PPM: Parts per million, the standard measure
of concentration in swimming pools. An example is one penny in $10,000.
PHENOL RED: The indicator solution which measures pH.
STABILIZER: (Cyanuric acid or conditioner)
s-triazinetrione, also called Isocyanuric Acid. A chemical which helps prolong
the useful life of chlorine in the water by slowing down chlorine decay due to
SUPERCHLORINATION: (Shock treatment) The practice of adding
5-10 times the normal daily chlorine dose to destroy algae, or to prevent
problems after heavy bather loads or severe rains.
TOTAL ALKALINITY: This
helps the water resist changes in pH.
TOTAL CHLORINE: The sum of the
amount of free chlorine and combined chlorine.
FOR--Bermuda Dunes, Cathedral City, Coachella, Indian Wells, Indio, La Quinta,
Palm Desert, Palm Springs, Rancho Mirage, Thousand Palms,