Copyright © 2016 ControlOMatic®, Inc. Grass Valley, California, USA
POOL AND SPA ORP AND PH CHEMICAL AUTOMATION
LOW COST INTERNET COMMUNICATION WITH
SMART PHONES, COMPUTERS AND NOTEPADS
ORP and Cynuric Acid (CYA)
This is not meant to be a scientific report but observations from the field regarding cyanuric acid's effect on the ability of chlorine to effectively oxidize swimming pool and spa water in a commercial environment.
There is much debate over the effects of cyanuric acid (CYA) on the ability of chlorine to oxidize and sanitize swimming pool and spa water. There are charts and scientific data that can be confusing and applicable in a controlled environment but in the field can be a whole different scenario so I will attempt to keep it simple and share what I have learned over 17 years.
Does cyanuric acid cause the ORP of swimming pool and spa water to drop? Most definitely! Having worked with ORP -
However, it wasn't until the mid 90's when I started working with Acu-
When I first started working with Acu-
Another interesting observation was on our outdoor pools we could tell when the sun was rising and setting based on ORP values alone. When the sun was setting, the ORP level would begin to rise and by nightfall, the ORP had risen by 40 – 50 mV. When the sun started rising, the ORP level started dropping again. This would confirm the theory that HOCl attaches itself to cyanuric acid in the presence of sunlight.
It was also noted that swimming pools with high usage and CYA levels above 70 PPM were almost impossible to keep clear and the ORP levels were below 650mV with FAC in the range or 3-
In my experience, using ORP control on a swimming pool works optimally in the 30-
by Lance Fitzsimmons
|Up and Comming Events|
|ORP and Cyanuric|