You need to be a member of Pool Genius Network™ to add comments!
This reply was deleted.
If you are a member of the "pool industry" community, you have found your home.
This is a network of pool builders, service professionals, retailers, and pool sales reps,…
For…
Swimming pools are often associated with luxury, relaxation, and endless summer fun. But there's more than just the allure of crystal-clear water that leads a…
The Journal of the Swimming Pool and Spa Industry is coming back! JSPSI, a peer-reviewed technical journal, began in 1995 as a subscription-supported print-based publication. It contained articles at a technical…
All pool plaster finishes should last 20 years or more. However, some last only 5 to 7 years, and some less than a year before the plaster surface deteriorates, discolors, and looks terrible.
Why the difference? Very often, plaster…
For 50 years, the pool industry has considered pool water within an LSI of -0.3 and +0.5 to be acceptable and balanced. But recently, and without providing any supporting science or research, the NPC is trying to convince the industry that any…
There are two important issues involved when trying to achieve quality colored pool plaster that will remain durable, attractive, and the proper shade for many years.
The first issue is to utilize superior workmanship practices to achieve…
Replies
That's just another piece of incorrect information in the pool industry.
This document gives detailed toxicity study data for Cyanuric Acid. Note in particular that it has minimal skin absorption which would be most relevant. It also has low toxicity for drinking water especially at the levels of CYA found in pools with a No Observed Adverse Effect Limit of 150 mg/kg/day so even at 100 ppm CYA that would be drinking over 100 liters of water EVERY DAY for a 150 pound person before any adverse effects (let alone toxicity) were seen. There was no carcinogenic potential seen in rats or mice in 2-year studies.
As Kim notes, the issue is really more with melamine and in particular with the combination of cyanuric acid (or related chemicals) and melamine since that forms a precipitate in the kidneys. It is melamine that was in animal feed from China in 2007 and in infant formula in China in 2008 that led to deaths of pets and babies. Melamine and uric acid can form a precipitate similar to melamine-cyanurate as can related cyanuric acid compounds like ammeline. However, there may have been other compounds in the pet food in addition to melamine since isolated melamine toxicity studies show far higher concentrations to be needed to show adverse effects (the infant formula had higher melamine concentrations that could account for those deaths).