Pool Info: Pool Glossary - Page 4
Pool Glossary (cont.)
CYANURIC ACID: A granular chemical added to the pool water which provides a shield to chlorine for protection from UV radiation, which disrupts the molecule, destroying its sanitizing ability.
DIATOMACEOUS EARTH: The filtering medium of the DE filter, this dry powder is the fossilized remains of the ancient plankton; diatom.
DIATOMACEOUS EARTH FILTER: A filter tank containing fabric covered grids which hold the DE powder up against the flow of the water.
DICHLORO-S-TRIAZINETRIONE: a chemical compound. It is an oxidizer, bacteriocide, algicide, and cleaning agent that reacts with water to form hypochlorous acid, which is related to bleach.
DISINFECTANT: Chemicals or processes which work to destroy vegetative forms of microorganisms and other contaminants. Examples are chlorine, bromine, Soft-Swim, and ionizers; also included are copper and silver algaecides.
DIRECTIONS: What you should read before using any chemicals.
DIRT DEMAND: The demand that your pool has for dirt. This level is inversely proportional to available time for cleaning. If you remove the dirt from the pool, you have created a dirt deficit, and the pool will actually suck dirt out of the air to maintain its dirt demand.
DPD: A method of testing for chlorine levels in the pool water. Unlike OTO, DPD testing allows determination of total and free available chlorine levels which through subtraction gives us combined levels.
DRY ACID: Sodium bisulfate, a granular form of acid used to lower pH and alkalinity in the water. It is safer and less caustic than muriatic acid. Usually available as a "pH decreaser."
EFFICACY: The power to produce an effect. Chlorine's efficacy is affected by many factors, including the sun, water balance, and the water's chlorine demand.
EFFLUENT: The water that flows out of the pump on its way through the filter, heating, treating equipment, and then returning to the pool. Also known as the pressure side.
electrolysis: A method of separating chemically bonded elements and compounds by passing an electric current through them.
ENZYMES: Used in swimming pool formulations designed to break down and digest oils in a pool or spa similar to the way enzymes are used in oil spill clean-up efforts.
FILL WATER: Used in filling or adding to the water level. Whether from the hose or from a well, your fill water brings its own chemical make up and water balance (or lack thereof).
FILM-X: A compound of citric acid used in cleaning plaster and other pool areas. Safe replacement for muriatic acid.
FOAMING: A term used to describe surface foam on your water, esp. in spas/hot tubs. Foaming is caused by high TDS levels working in combination with soft water and oils. Certain low grade algaecides can foam when added to pool or spa. Use enzymes for foam control.
FLOCCULENT: Essentially the same as a coagulant, this chemical (such as alum) is used to combined suspended alkaline material and/or algae into a heavy gel, which sinks to the bottom for vacuuming to waste.