Discount Pool Supplies and Spa Supplies

	Min	Ideal	Max
Free Chlorine	1.0 ppm	1.0 - 3.0 ppm	3.0 ppm
Combined Chlorine	None	None	0.2 ppm
Bromine	2.0 ppm	2.0 - 4.0 ppm	4.0 ppm
Stabilizer (Cyanuric Acid)	10 ppm	30-50 ppm	150 ppm
pH - potential Hydrogen	7.2	7.4 - 7.6	7.8
Total Alkalinity	80 ppm		140 ppm
Gunite (plaster)		80 - 120 ppm
Vinyl-lined, fiberglass, or painted		100 - 140 ppm
Total Dissolved Solids (TDS)	300 ppm	1000 - 2000 ppm	3000 ppm
Calcium Hardness	150 ppm	200-400 ppm	500-1000 ppm*
Iron & Copper (Heavy Metals)	None	None	0.2 ppm

*This depends on local fill water conditions. Normally, 500 ppm is the maximum.