Total Hardness Control Kit HI3890
Hardness, or TH, gives the total concentration of calcium and magnesium salts on: 1°fH / 0.562°dH hardness corresponds to 10 mg/L (ppm) calcium carbonate.
The harder the water, the bigger the risk of calcium and magnesium salt deposits on the walls of pools and spas. On the other hand, water that is too soft can be corrosive.
°fH °dH
very soft: 0—7 0—4
soft: 7—15 4—8
slightly hard: 15—25 8—14
medium hard: 25—32 14—18
hard: 32—42 18—23
very hard: >42 >23
The ideal TH for pool water is between 10 and 20°fH or 5 and 11°dH.
Complete setup
- All required materials are included with the test kit, such as the sample beaker, indicator and buffer.
Specifications HI3890 Total Hardness (*as CaCO₃)
Type: titration
Range: 0 - 80 TH **
Smallest Increment: 1 TH **
Method: calmagite
Ordering Information: HI3890 test kit comes with 30 mL hardness buffer, 10 mL calmagite indicator and 50 mL
plastic beaker with cap.