LaMotte Pool & Spa Owner's Handbook - Manual (Page 14)

THE IMPORTANCE OF OTHER
WATER TEST FACTORS
The following test factors may occasionally be a factor in your water
management program. Learning about them will make it easier to
understand why a pool professional may be asking you to take action to
protect your pool or spa from an undesirable water condition. Except for
temperature, most of these tests are done solely by pool pros either in a
retail store or on-site. This chapter will also help the pool or spa owner
identify what symptoms may lead to future problems. See also, the
Trouble-Shooting Water Problems guide in chapter 5.
CYANURIC ACID
Cyanuric acid is used to protect chlorine from UV degradation
by sunlight. In sun-belt regions, higher levels of cyanuric acid are common
due to the user’s eagerness to protect their chlorine and because cyanuric
acid does not dissipate by itself. The only way to reduce cyanuric acid
levels is by adding fresh water. Since health agencies feel high levels of
cyanuric acid may inhibit the reactivity of free chlorine, most pool owners
are directed to stay below 150 ppm. Cyanuric acid levels should be tested
monthly, especially if free chlorine is rapidly lost or the pool has been on
dichlor or trichlor (chlorines that contain cyanuric acid) for a year or
more.
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The ideal range for cyanuric acid in pools
is 30 -100 ppm - regional needs vary.
IDEAL
RANGE!