รายละเอียด:
WaterWorks 5
30 Packets with color chart
Range: pH: 6, 6.5, 7, 7.5, 8, 8.5, 9
Total Alkalinity: 0, 40, 80, 120, 240, 360 ppm (mg/l)
Free Chlorine: 0, 0.1, 0.2, 0.5, 1, 2.5, 5 ppr (mg/l)
Total Chlorine: 0, 0.1, 0.2, 0.5, 1, 2.5, 5 ppm (mg/l)
Total Hardness: 0, 50, 120, 180, 250, 425 ppm (mg/l)