2019-2020 Purchasing Guide Volume 1

QUICK REFERENCE CHARTS

RECOMMENDED GUIDELINES FOR WATER QUALITY APSP (ASSOCIATION OF POOL & SPA PROFESSIONALS) GUIDELINES FOR CHEMICAL OPERATIONAL PARAMETERS † ( effective 4/2011)

Minimum

Ideal

Maximum

Pool: 1.0 ppm Spa: 2.0 ppm

2.0 – 4.0 ppm 2.0 – 4.0 ppm

None Given ‡

Free Chlorine (FAC)

Combined Chlorine (CAC)

Pool: 0.2 ppm Spa: 0.5 ppm

0.0 ppm

0.0 ppm

Pool: 1.0 ppm Spa: 2.0 ppm

3.0 – 4.0 ppm 4.0 – 6.0 ppm

None Given ‡

Bromine

pH

7.2

7.4 – 7.6

7.8 #

Total Alkalinity Ideal range depends upon the type of sanitizer used. Maintain between 80-120 ppm.

80 –100 ppm (for calcium hypochlorite, sodium hypochlorite and lithium hypochlorite) 100 –120 ppm (for gas chlorine, dichlor, tri- chlor and bromine compounds)

60 ppm

180 ppm

Pool: 150 ppm Spa: 100 ppm

200 – 400 ppm 150 – 250 ppm

1000 ppm* 800 ppm

Calcium Hardness

1500 ppm over start-up TDS**

TDS

N/A

N/A

Iron & Copper (Heavy Metals) Stabilizer ## (Cyanuric Acid)

0.0 ppm

0.0 ppm

0.0 ppm

10 ppm

30 – 50 ppm

100 ppm #

† Applicable health department guidelines and label directions supersede these. ‡ U.S. EPA maximum of 4.0 ppm chlorine / 8.0 ppm bromine is noted. * Depends on local fill water conditions. Normally 500 ppm is the maximum.

** If the pool has a chlorine generator, drain when the TDS is 1500 ppm above the salt level. Most health departments recommend draining a spa when the TDS is 1200-1500 ppm above the fill water TDS level. Never drain more than a third of the water from vinyl- liner or fiberglass pools at any time. The preferred method is to drain one foot of pool water and add one foot of fresh water at the same time. Always drain using a submersible pump. # Varies per state and local health code. ## Outdoor, chlorinated pools only.

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