SHOP
Account
Cart
Shop All
  1. Poolweb
  2. Water Testing
  3. OTO Test Kits

OTO Test Kits

6 Results
 
PoolMaster 5-Way Test Kit
Express Ship
PoolMaster 5-Way Test Kit
5 (2)
Poolmaster #945-22260
67 in stock
$34.10
 
All-In-One 4-Way Test Kit 78HR OTO (High-Range)
Express Ship
All-In-One 4-Way Test Kit 78HR OTO (High-Range)
4.7 (3)
Pentair #R151186
17 in stock
$40.86
Taylor Residential 6-Way Bromine, Chlorine, pH (Acid and Base Demand, Alkalinity Test Kit .75 Oz. - K-1003
Taylor Residential 6-Way Bromine, Chlorine, pH (Acid and Base Demand, Alkalinity Test Kit .75 Oz. - K-1003
3.5 (2)
Taylor #K-1003
1 in stock
$33.65
2 in 1 pH and Chlorine OTO Test Kit
Express Ship
2 in 1 pH and Chlorine OTO Test Kit
5 (1)
Pentair #R151076
38 in stock
$23.11
Taylor Residential Basic Bromine, Chlorine (Hi Range) and OT/pH Test Kit .75 Oz. - K-1000
Taylor Residential Basic Bromine, Chlorine (Hi Range) and OT/pH Test Kit .75 Oz. - K-1000
5 (1)
Taylor #K-1000
2 in stock
$17.10
 
2 in 1 Bromine and pH Test Kit OTO
2 in 1 Bromine and pH Test Kit OTO
Pentair #R151196
Allow 1-2 Months to Ship
$23.14

OTO Pool Water Test Kits

OTO test kits use a liquid chemical OTO (orthotolidine) that causes a color change to yellow in the presence of total chlorine. Using a comparator, you would look for the color change. OTO is recommended for pools that are sanitized using Bromine. This method only measures total chlorine and is not permitted to be used at regulated facilities. It does not measure free chlorine.