Cyanuric Acid / Stabilizer Conditioner
Cyanuric acid, CYA, (also known as stabilizer or conditioner) prevents rapid breakdown of chlorine by sunlight and inhibits the
corrosive effects of chlorine and bromine. Regulations may exist regarding use of Cyanuric acid; please consult your pool profession-
al. Use the chart below to determine the amount of Cyanuric acid needed. Test water with test kit that includes
CYA testing, then use the chart below to determine the amount to add.
POUNDS OF CYANURIC ACID NEEDED FOR 75 PPM RESIDUAL
NOTE: ABOVE CHART BASED ON 1 POUND OF CYANURIC ACID ADDED TO 41,500 POUNDS OF
WATER (5,000 U S GALLONS) WHICH EQUALS 25 PPM OF CYA.
Recommended required Cyanuric Acid levels are 30 - 100 ppm. To add, pour around the perimeter of the pool.
Allow CYA to dissolve and circulate for 24 hours before measuring again.
Pre-dissolving any chemical prior to addition to pool water is advised.
KILOGRAMS OF CYANURIC ACID NEEDED FOR 75 PPM RESIDUAL
Cyanuric Acid Needed for 75 PPM
8
Section 1 b
Pool / Spa Volume in US Gallons
0 ppm
0.12 0.31 0.47
0.62
0.94
1.6
3.1
6.2
9.4
12.5
18.7
12
ppm
0.1 0.26 0.39
0.52
0.79
1.3
2.6
5.2
7.9
10.5
15.7
25 ppm
0.08 0.21 0.31
0.42
0.62
1
2.1
4.2
6.2
8.3
12.5
37 ppm
0.06 0.16 0.24
0.32
0.47
0.79
1.6
3.2
4.7
6.3
9.5
50 ppm
0.04 0.1
0.16
0.21
0.31
0.52
1
2.1
3.1
4.2
6.2
62 ppm
0.02 0.05 0.08
0.11
0.16
0.27
0.54
1.1
1.6
2.2
3.2
CYA Level
Before Addition
200 500 750 1000 1500 2500 5000 10000 15000 20000
30000
Pool / Spa Volume in Liters
0 ppm
0.08 0.15 0.23
0.30
0.38
0.75
1.90
3.80
5.6
7.5
9.0
12
ppm
0.06
0.13 0.19
0.25
0.32
0.63
1.60
3.20
4.7
6.3
7.6
25 ppm
0.05
0.10 0.15
0.20
0.25
0.50
1.30
2.50
3.8
5.0
6.0
37 ppm
0.04
0.08 0.11
0.15
0.19
0.38
1.00
1.90
2.9
3.8
4.6
50 ppm
0.03
0.05 0.08
0.10
0.13
0.25
0.63
1.30
1.9
2.5
3.0
62
ppm
0.01 0.03 0.04
0.05
0.07
0.13
0.33
0.65
1.0
1.3
1.6
CYA Level
Before Addition
1000 2000 3000 4000 5000 10000 25000 50000 75000 100000 120000
