Thursday, October 10, 2013

Chemicals to terminate Pond Chemicals

Water bodies support life to a large number of creatures and microorganisms. Different types of chemicals are used to keep them clean and free from contaminants. Water “features” such as swimming pools and fish ponds harbor a lot of harmful organisms and chemicals, like pond algae and pond weed, organic matter and sludge, ammonia, chlorine and phosphates. Algae are very small organisms that can turn the water cloudy and can form scum over the surface, thus blocking sunlight to penetrate through the water. They may also release certain toxins which can pose serious threat to humans, fish and plants. Cloudy, turbid and unhygienic water may harbor disease-causing bacteria (E. coli and giardia), virus and chlorine-resistant germs such as cryptosporidium. These invaders can cause severe illness outbreak.
Chemicals used to clean pond water
Algaecide
Algaecide is a very fast and efficient way to get rid of algae and cynobacteria (red/green slime) from the pond water and swimming pools. Regular use of these algaecides lessens the deposition of plant material that may clog the filter and pump of the pond, thus increasing the lifespan of the pond filter system. Three types of algaecides are available in the market-
  • Copper salts- are very effective algaecides and used in ponds to prevent and kill algae formation. However, regular copper usage can precipitate pool water, thus staining the walls of the pond.
  • Quats- are one of the cheapest and largest selling algaecide. They are quaternary ammonium salts that act as surfactants by lowering the surface tension of water resulting in algae cell wall rupture, and finally death. Quats cause foaming on pond surface and are generally used as a preventative measure for algal growth.
  • Polyquats- are non-foaming algaecides. They are very effective against green algae, chlorine-resistant mustard algae and black algae.
However, there are certain limitations to the use of algaecide. Most algaecides require them to be added to water at specific concentrations and may cause serious harm to fishes, swimmers and aquatic livestock, if used improperly. Ponds with high flow-through rate can rapidly dilute or flush away the algicide, thus rendering it ineffective. Also, algaecide is a much expensive option than other environment-friendly pond chemical alternatives.
Water clarifiers
Water clarifiers, sometimes also referred to as water polishers, work on particulates such as silt, organic matter, algae, oils, lotions and metals. They are a type of polymer (large molecule composed of repeating structural units connected by covalent bonds) with a positive ionic charge. Suspended particulates are mostly negatively charged and therefore, get attracted to the positive ends of the polymers (Coagulation). This leads to formation of large, filterable particles. Accumulation of these large filterable particles results in the formation of much larger aggregated clusters (Flocculation). A water clarifier must be able to remove both oil and the organic matter from the water, by working through a complete process of coagulation and flocculation. This unique combined action helps in exceptional filtering of these particles, leaving the pool or pond water clean and transparent.

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