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Pool Sizing Formula
Type of Salt to Use
It is important to use only sodium chloride (NaCl) salt that is greater than 99% pure. This is common food
quality or water softener salt and is usually available at building supply stores in 40-80 lb. bags labeled
coarse or fine “Solar Salt”. It is also acceptable to use water conditioning salt pellets, however, it will take
longer for them to dissolve. Do not use rock salt, or salt with more than 1% of yellow prussiate of soda,
salt with anti-caking additives, or iodized salt.
How to Add Salt
For new plaster pools, wait 10-14 days before adding salt to allow the plaster to cure. Turn the circulating
pump on and add salt directly into the pool. Brush the salt around to speed up the dissolving process—do
not allow salt to pile up on the bottom of the pool. Run the filter pump for 24 hours with the suction coming
from the main drain (use pool vacuum if there is no main drain) to allow the salt to evenly disperse through-
out the pool. The salt display may take 24 hours to respond to the change in salt concentration.
Always check stabilizer (cyanuric acid), when checking salt. These levels will most likely decline together.
Use the chart below to determine how much stabilizer must be added to raise the level to 80 ppm.
Gallons
Liters
(pool size in feet)
(pool size in meters)
Rectangular
Round
Oval
Diameter x Diameter x
Average Depth x 5.9
Length x Width x
Average Depth x 6.7
Length x Width x
Average Depth x 7.5
Diameter x Diameter x
Average Depth x 785
Length x Width x
Average Depth x 893
Length x Width x
Average Depth x 1000
POUNDS and (Kg) OF STABILIZER (CYANURIC ACID) NEEDED FOR 80 PPM
Gallons and (Liters) of Pool/Spa water
Current
Stabilizer
Level (ppm)
0 ppm
20 ppm
60 ppm
30 ppm
40 ppm
50 ppm
70 ppm
80 ppm
10 ppm
12,000
(45000)
8,000
(30000)
14,000
(52500)
10,000
(37500)
16,000
(60000)
18,000
(67500)
20,000
(75000)
22,000
(82500)
32,000
(120000)
24,000
(90000)
34,000
(127500)
26,000
(97500)
36,000
(135000)
28,000
(105000)
38,000
(142500)
30,000
(112500)
40,000
(150000)
8.0
(3.6)
5.3
(3.6)
8.0
(3.6)
8.0
(3.6)
9.4
(4.3)
6.7
(4.3)
9.4
(4.3)
10.7
(4.9)
12.0
(5.4)
12.0
(5.4)
13.4
(6.1)
14.7
(6.7)
21.3
(9.7)
16.0
(7.3)
22.7
(10.3)
18.7
(8.5)
25.3
(11.5)
20.0
(9.1)
26.7
(12.0)
7.0
)
(3.2
4.7
(3.2)
8.2
(3.7)
5.8
(3.7)
10.5
(4.8)
11.7
(5.3)
12.9
(5.9)
18.7
(8.5)
14.0
(6.4)
19.8
(9.0)
15.2
(6.9)
21.0
(9.5)
16.4
(7.4)
22.2
(10.0)
17.2
(8.0)
23.3
(10.5)
6.0
(2.7)
4.0
(2.7)
6.0
(2.7)
6.0
(2.7)
8.5
(3.9)
7.0
(3.2)
9.0
(2.2)
10.0
(4.5)
10.0
(4.5)
14.2
(6.3)
11.0
(5.0)
16.0
(7.2)
13.0
(5.9)
18.0
(8.1)
14.0
(6.4)
19.0
(8.6)
15.0
(6.8)
20.0
(9.0)
5.0
(2.3)
3.3
(2.3)
5.0
(2.3)
5.9
(2.7)
4.2
(2.7)
6.7
(3.0)
8.4
(3.8)
6.7
(3.0)
7.5
(3.4)
9.2
(4.2)
13.3
(6.0)
10.8
(4.9)
15.0
(6.7)
11.7
(5.2)
15.8
(7.1)
12.5
(5.6)
16.7
(7.5)
4.0
(1.8)
2.7
(1.8)
4.0
(1.8)
4.0
(1.8)
5.7
(2.6)
4.7
(2.1)
3.3
(2.1)
5.4
(2.4)
7.4
(3.3)
10.7
(4.8)
8.7
(3.9)
12.0
(5.4)
9.3
(4.2)
12.7
(5.7)
10.0
(4.5)
13.3
(6.0)
3.0
(1.4)
2.0
(1.4)
3.0
(1.4)
3.5
(1.6)
2.5
(1.6)
4.5
(2.0)
5.5
(2.5)
8.0
(3.6)
6.5
(2.9)
9.0
(4.1)
7.0
(3.2)
9.5
(4.3)
7.5
(3.4)
10.0
(4.5)
2.0
(.91)
1.3
(.91)
2.0
(.91)
2.8
(1.3)
2.3
(1.1)
1.7
(1.1)
2.7
(1.2)
3.3
(1.5)
3.7
(1.7)
5.3
(2.4)
4.3
(2.0)
4.7
(2.1)
6.3
(2.8)
5.0
(2.3)
6.7
(3.0)
1.0
(.45)
0.7
(.45)
1.2
(.54)
0.8
(.54)
1.4
(.64)
1.5
(.68)
1.7
(.77)
1.8
(.82)
2.7
(1.2)
2.2
(1.0)
3.0
(1.3)
2.3
(1.1)
3.2
(1.4)
2.5
(1.2)
3.3
(1.5)
0.00.0 0.00.0 0.0 0.0 0.0 0.0
0.00.0 0.00.0 0.00.0 0.00.0 0.0
5