Thermometers & testing

Accurate testing for perfectly balanced water

Sort

153 products

Best selling
  • Featured
  • Most relevant
  • Best selling
  • Alphabetically, A-Z
  • Alphabetically, Z-A
  • Price, low to high
  • Price, high to low
  • Date, old to new
  • Date, new to old
PENR161634
5% off
Rainbow #6 Solution, 1/2 Ounce | R161634
$3.23
$3.07
PENR151076
5% off
Pentair #752 2-Way OTO Test Kit, Chlorine & pH
$30.77
$29.30
PENR161576
5% off
Pentair Rainbow DPD #1 Tablets, 1000-Pack
$109.65
$104.43
PENR161178
9% off
Pentair Rainbow pH Replacement Solution #2, 1 oz
$7.58
$6.89
PENR151226
Sold Out
Pentair #79 Cyanuric Acid Liquid Drop Test Kit, 8 oz
$35.88
$34.17
PENR161180
9% off
Pentair Rainbow pH Replacement Solution #2, 1 oz
$6.15
$5.59
PENR161025
9% off
Pentair Rainbow OTO Replacement Solution, 1 oz
$5.05
$4.59
PENR161204
9% off
Pentair Rainbow Chlorine Neutralizer Replacement Solution #4, 1/2 oz
$4.72
$4.29
PENR151186
PENR151186
5% off
Pentair 78HR 4-Way Liquid Drop Test Kit
$61.50
$58.57
PENR161644
9% off
Rainbow #7 Solution Water Hardness, 1 Ounce | R161644
$3.95
$3.59
PENR151196
PENR151196
5% off
Pentair #756 Rainbow 2-In-1 Bromine Test Kit | R151196
$27.51
$26.20
PENR161185
9% off
Pentair Rainbow Acid Demand Replacement Solution #3, 1 oz
$4.39
$3.99
PENSL1DW
5% off
Pentair In-Line Thermometer w/Nylon Well, 30 to 130 Degrees F
$81.66
$77.77
PENR161606
5% off
Rainbow Cyanuric Acid Solution, 16 Ounce | R161606
$11.61
$11.06
PLTAP188
Sold Out
Palintest Ap188 Alk Test | PTESTAP188
$127.07
$121.01
PLTAP0331
5% off
Palintest DPD #3 Phot, Xt 250 Tablets | PTESTAP033/1
$54.23
$51.64
LMO297612
5% off
Lamotte Insta-Test 3 Plus Blister Carded | 2976-12
$6.54
$6.23
LMO3012G12
Sold Out
Nitrate Test Strip (25 Per Bottle) | 3012-G-12
$7.89
$7.51
LMOP6740G
5% off
LaMotte DPD 1A Free Chlorine Reagent, 30 ml | P-6740-G
$8.91
$8.49
LMO4330H
LMO4330H
5% off
Lamotte Spin Disk Chlorine/Bromine Plus Borate | 4330-H
$165.90
$158.00
LMOR2057
5% off
LaMotte ColorQ TesTabs PRO 7 Refill Kit | R2057
$73.97
$70.44
LMO4335H
Sold Out
Lamotte Free Chlorine/Bromine/Alkalinity/Ph | 4335-H
$161.58
$153.89
Product image
5% off
LAMOTTE SYRINGE TIPS (3)
$12.54
$11.94
LMO4331H
5% off
Lamotte Biguanide Plus Borate | 4331-H
$170.22
$162.11
LMO3580
5% off
Lamotte Waterlink Spin Touch Lab | 3580
$1,542.35
$1,468.90
LMO299812
LMO299812
LMO299812
5% off
Lamotte Insta-Test Sodium Chloride-Salt | 2998-12
$6.45
$6.14
LMOR2056
5% off
Lamotte ColorQ Pro 7 Test Reagent Refill Kit | R-2056
$78.98
$75.21
LMOP6741G
5% off
LaMotte DPD 1B Free Chlorine Reagent, 30 ml | P-6741-G
$8.91
$8.49
LMO3028BC12
LMO3028BC12
5% off
Lamotte Insta-Test 6-Way Plus Blister Carded, 50 Strips | 3028-BC-12
$10.56
$10.06
LMO4330J
5% off
Lamotte Chlorine/Bromine Plus Borate Spin Disk | 4330-J
$314.52
$299.54

Get a Quote