TDS Meters and Solutions

  • GH pH Test Indicator 8 oz
    General Hydroponics

    GH pH Test Indicator 8 oz

    General Hydroponics pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator and observe the coloration of the liquid in the test vial. Many experienced growers prefer our pH Test Kit to...
    $10.05
    $14.53
    $12.06
  • GH pH Down 8 oz (12/Cs)
    General Hydroponics

    GH pH Down 8 oz (12/Cs)

    The acid formulation uses phosphoric acid to lower the pH to the proper level.
    $7.77
    $10.59
    $9.32
  • GH pH Up Liquid Gallon (4/Cs)
    General Hydroponics

    GH pH Up Liquid Gallon (4/Cs)

    This Base solution is formulated using potassium hydroxide and potassium carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.
    $26.06
    $39.06
    $31.27
  • GH pH Up Liquid Quart (12/Cs)
    General Hydroponics

    GH pH Up Liquid Quart (12/Cs)

    This Base solution is formulated using potassium hydroxide and potassium carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.
    $10.85
    $15.68
    $13.02
  • GH pH Up 8 oz (12/Cs)
    General Hydroponics

    GH pH Up 8 oz (12/Cs)

    This Base solution is formulated using potassium hydroxide and potassium carbonate. Add a little at a time when your nutrient pH is too low in order to raise the pH to the proper level.
    $7.77
    $10.59
    $9.32
  • GH pH Control Kit (12/Cs)
    General Hydroponics

    GH pH Control Kit (12/Cs)

    General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial.
    $15.19
    $22.75
    $18.23