Shop All Water Testing & Control

  • Save 33%
    PENTAIR WATER POOL AND SPA INC SINK/FLOAT TUBE THERMOMETER #136 ABS E-Z READ | R141200
    PENTAIR WATER POOL AND SPA INC SINK/FLOAT TUBE THERMOMETER #136 ABS E-Z READ | R141200
    SKU: R141200
    $36.99
    $56
    In stock
  • Save 51%
    Pentair #127 Rainbow Economy Thermometer | R141036
    Pentair #127 Rainbow Economy Thermometer | R141036
    SKU: R141036
    $19
    $39
    In stock
  • Save 35%
    POOLMASTER INCORPORATED SOLUTION #2 PHENOL RED PS9752 12/CS 1OZ PRO SERIES | 22392
    SKU: 22392
    $16.88
    $26
    In stock
  • Save 35% Out of stock
    POOLMASTER INCORPORATED SOLUTION #3 ACID DEMAND PS9753 12/CS 1OZ PRO SERIES | 22393
    SKU: 22393
    $16.88
    $26
    Out of stock
  • Save 35% Out of stock
    POOLMASTER INCORPORATED SOLUTION #4 CHLOR NEUTRALIZER PS9754 24/CS .5OZ PRO SERIES | 22394
    SKU: 22394
    $15.58
    $24
    Out of stock
  • Save 35% Out of stock
    POOLMASTER INCORPORATED .5OZ PHENOL RED REAGENT PS899PHE SUPREME SERIES | 24251
    SKU: 24251
    $15.58
    $24
    Out of stock
  • Save 34% Out of stock
    KOKIDO DEVELOPMENT LTD TEST KIT REFILL PS102CS .5OZ OTO/ PHENOL | K102CBX/SCP
    SKU: K102CBX/SCP
    $17.80
    $27
    Out of stock
  • Save 33%
    POOLMASTER INCORPORATED SOLUTION #2 PHENOL RED PS9757 12/CS 8OZ PRO SERIES | 22399
    SKU: 22399
    $16.57
    $25
    In stock
  • Save 33%
    POOLMASTER INCORPORATED 3-WAY TEST KIT W/ CASE PS899 SUPREME SERIES | 22340
    SKU: 22340
    $29.95
    $45
    In stock
  • Save 34% Out of stock
    POOLMASTER INCORPORATED 5-WAY DPD TEST KIT W/ CASE PS975 PROFESSIONAL SERIES | 22339
    SKU: 22339
    $34.78
    $53
    Out of stock
  • Save 35%
    POOLMASTER INCORPORATED .5OZ OTO REAGENT PS899OTO SUPREME SERIES | 24241
    SKU: 24241
    $15.58
    $24
    In stock
  • Save 33% Out of stock
    HACH COMPANY 7-WAY TEST STRIP 12/CS 50CT | PS030
    SKU: PS030
    $31.86
    $48
    Out of stock
  • Save 33% Out of stock
    POOLMASTER INCORPORATED SOLUTION #1 OTO PS9756 12/CS 8OZ PRO SERIES | 22398
    SKU: 22398
    $25.24
    $38
    Out of stock
  • Save 33% Out of stock
    POOLMASTER INCORPORATED #1 DPD FREE CHL TABS 4/CS 250BX | 23249
    SKU: 23249
    $32.57
    $49
    Out of stock
  • Save 33%
    POOLMASTER INCORPORATED CL NEUTRALIZER SOLUTION .5OZ SOL #4 | 22414
    SKU: 22414
    $17.99
    $27
    In stock
  • Save 35%
    POOLMASTER INCORPORATED SOLUTION #1 OTO PS9751 12/CS 1OZ PRO SERIES | 22391
    SKU: 22391
    $16.88
    $26
    In stock
  • Save 35% Out of stock
    POOLMASTER INCORPORATED SOLUTION #5 ALK INDICATOR PS9755 24/CS .5OZ PRO SERIES | 22395
    SKU: 22395
    $15.58
    $24
    Out of stock
  • Save 31%
    PoolStyle 22290 5-Way Test Kit with Reagent Round Block
    POOLMASTER INCORPORATED W/ REAGENTS - ROUND BLOCK 5-WAY TEST KIT | 22290
    SKU: 22290
    $39
    $57
    In stock
  • Save 34% Out of stock
    POOLMASTER INCORPORATED 5-WAY OTO TEST KIT W/ CASE PS974 PROFESSIONAL SERIES | 22341
    SKU: 22341
    $32.93
    $50
    Out of stock
  • Save 33%
    POOLMASTER INCORPORATED DPD FREE CHL TABS #1 250/BOX | 23269
    SKU: 23269
    $32.57
    $49
    In stock
  • Save 33%
    POOLMASTER INCORPORATED PHENOL SOLUTION F/ 3-WAY .5OZ RED 24/CS | 24271
    SKU: 24271
    $17.99
    $27
    In stock
  • Save 33%
    POOLMASTER INCORPORATED PHENOL RED SOLUTION 8OZ SOL #2 | 22419
    SKU: 22419
    $17.25
    $26
    In stock
  • Save 34%
    POOLMASTER INCORPORATED OTO SOLUTION F/ 3-WAY .5OZ | 24261
    SKU: 24261
    $12.36
    $19
    In stock
  • Save 36%
    POOLMASTER INCORPORATED ACID DEMAND SOLUTION 1OZ SOL #3 | 22413
    SKU: 22413
    $12.74
    $20
    In stock