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Report: etching caused by water chemistry.(Newsroom)
A study conducted by the National Plasterers Council in conjunction with Polytechnic State University in San Luis Obispo, Calif., has concluded that water chemistry is the most important factor in the spot etching of swimming pool plaster.
The cause of spot etching has polarized aquatics professionals for years. The service and chlorine industries believe troweling techniques are at fault, while plasterers cite bad water chemistry as the culprit.
In the past, each side has presented data that supported its own position.
For this study, NPC worked with the engineering faculty at Ca] Poly to investigate not only spot etching, but other pool issues as well. NSPI, IPSSA and UPA also are participating.
The current spot-etching study began a year ago and the final report was recently released exclusively to Pool & Spa News, the sister publication of Aquatics International. One of the conclusions in the 86-page document stated, "Under identical conditions, the aggressive pool sections showed nearly 12 times more spot etching than the balanced pool sections. The recorded percentage of etching in the balanced sections was, on average, 4.15 percent, while the percentage of etching ...
- New spot etching study released.(Making News)
- Magazine article from: Pool & Spa News Dumas, Bob September 3, 2004 700+ words
...Calif., has concluded that water chemistry is the most important factor in the spot etching of swimming pool plaster. The...fault, while plasterers cite bad water chemistry as the culprit. In the past...
- What's next for spot 'etching' studies?(Letters)(Letter to the Editor)
- Magazine article from: Pool & Spa News Hales, Que Latta, Doug Skinner, Kim November 1, 2004 700+ words
...story in Sept. 3 issue, titled "New Spot Etching Study Released" We congratulate the...unintentionally proven our studies--that spot "etching," which, as has been proven, is...researcher recommend for preventing spot "etching" in ANSI/NSPI balanced pools, or...
- San Luis Obispo, Calif., center makes splash in swimming-pool research.
- Newspaper article from: Knight Ridder/Tribune Business News November 17, 2004 700+ words
...others. Measuring sticks used to determine water chemistry are also being tested. Previously, the...determine the most important variable creating spot etching. Research pointed to water chemistry, specifically in relation to pH levels...
- MAJOR ION WATER CHEMISTRY FOR WELLS NEAR THE NORTHEAST CORNER OF THE IDAHO...
- Magazine article from: Journal of the Idaho Academy of Science Hall, L. Flint June 1, 2000 700+ words
...A 1999 INEEL OP comparison of water chemistry data from seven wells in the northern...District Office of the USGS. Major ion water chemistry, in light of well completion and...document an important transition in water chemistry as waters from the Yellowstone Plateau...
- Training time: a new study suggests that pool operators need better training to...
- Magazine article from: Pool & Spa News Johnston, Kevin M. Kinziger, Michael November 28, 2003 700+ words
...those pools with violations, water chemistry had the most frequent infractions...with the working knowledge of water chemistry and pool operations necessary to meet state standards. Water chemistry is one of the basic items a pool...
- Symposium increases water chemistry awareness.(news connection)
- Magazine article from: Reeves Journal February 1, 2005 700+ words
...draw more attention to how changes in water chemistry are causing a growing number of copper...Specialty Contractors sponsored a Water Chemistry Symposium Jan. 12 in Irvine, Calif...Institute, who explained how potable water chemistry has changed in recent years and how...
- Water chemistry `maverick' dies.
- Magazine article from: Pool & Spa News Dumas, Bob November 15, 2002 700+ words
...at times controversial, experts on water chemistry died Oct. 20 of cancer. He was 61...expanded that business to include water chemistry and changed the firm's name to United...amp; Spa Show, where he taught water chemistry classes. His teachings included a...
- WESTINGHOUSE WITNESS: PROOF OF SUCCESS FOR WATER CHEMISTRY TO PREVENT TUBE...
- Press release article from: PR Newswire November 9, 1994 700+ words
...really don't know if the molar ratio water chemistry recommended by Westinghouse has been...also did not know why some of the water chemistry monitors at the Beaver Valley plant...admitted that he had not studied any water chemistry data for Beaver Valley Unit Two...
