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  • API GH & KH Test Kit [For Freshwater use only]

    API GH & KH Test Kit [For Freshwater use only]

    Tests tap water and freshwater aquariums for general hardness (GH) and carbonate hardness (KH).…
    $12.46
  • API KH Test Kit [Fresh or Saltwater Use]

    API KH Test Kit [Fresh or Saltwater Use]

    Tests tap water & fresh or saltwater aquariums for carbonate hardness (KH).…
    $7.50
  • API pH Test Kit - 6.0 - 7.6 [For Freshwater use only]

    API pH Test Kit - 6.0 - 7.6 [For Freshwater use only]

    Tests pH levels from 6.0 to 7.6. 250 tests per kit.…
    $7.21
  • API pH Test Kit - High Range [For Both Freshwater & Saltwater Use]

    API pH Test Kit - High Range [For Both Freshwater & Saltwater Use]

    Reads the pH of water within the high range of 7.4 to 8.8. 160 tests per kit.…
    $8.17
  • Aquaforest Alkalinity Test Pro [78 - 100 Tests]

    Aquaforest Alkalinity Test Pro [78 - 100 Tests]

    Aquaforest TestPro Alkalinity is designed to quickly measure Carbonate Hardness(dKH) and Alkalinity(meq /L) in marine water. The recommended Carbonate Hardness level is between 6.5 and 8.0 dKH. This kit contains sufficient reagents to perform approximately 78-100 separate tests within that range.…
    $17.99
  • Hanna Alkalinity (dKH) Checker

    Hanna Alkalinity (dKH) Checker

    The Hanna Marine Alkalinity Checker® measures alkalinity in dKH units, using a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.…
    $69.99
  • Hanna Alkalinity (dKH) Reagent

    Hanna Alkalinity (dKH) Reagent

    Replacement reagents for the Hanna Marine Alkalinity (dKH) Checker® HC – HI772. These high-quality reagents are manufactured in Hanna's state-of-the-art facility and are clearly marked with the lot number and expiration date on each packet for traceability.…
    $18.99
  • HM Digital pH Buffer Solution [12 pack - powder]

    HM Digital pH Buffer Solution [12 pack - powder]

    HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life.…
    $19.58
  • HM Digital pH Electrode Storage Solution [60 cc]

    HM Digital pH Electrode Storage Solution [60 cc]

    pH storage solution for HM Digital’s PH-200 / PH-80 as well as other brands of pH meters. Always make sure your sensor is kept in an electrode storage solution.…
    $12.41
  • HM Digital Water Resistant pH/Temp Meter

    HM Digital Water Resistant pH/Temp Meter

    The HM Digital PH-80 has proven to be the MOST reliable pH meter in its price range. It has become a favorite in such applications as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.…
    $99.99
  • HM Digital Waterproof pH & Temperature Meter

    HM Digital Waterproof pH & Temperature Meter

    Measures pH and temperature with simultaneous temperature and pH display. Auto-ranging three point calibration with digital fine tuning. Includes 4 pH buffer solution in a sponge embedded in a clear cap, batteries, lanyard and pH 7.0 buffer. Waterproof housing. Measurement Range: 0-14 pH. Ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more.…
    $148.88
  • pH Alert [Constant Readout]

    pH Alert [Constant Readout]

    Product Description pH Alert™ is a unique color device designed to be placed in the aquarium or filter and monitor pH continuously. A sensor changes color reversibly to alert you shifts to in pH levels between 5.8 and 8.2. No tests, no strips, just constant readings. Freshwater Only.…
    $9.79
  • Red Sea Alkalinity PRO Reagent Refill Kit

    Red Sea Alkalinity PRO Reagent Refill Kit

    Reagent refill for Red Sea Alkalinity PRO Test Kit. Enough reagent for 75 tests. Having reagent refills available, makes the ReaSea PRO line of test kits one of the most affordable high quality test kits you can buy.…
    $16.99
  • Red Sea Alkalinity Pro Test Kit [75 tests]

    Red Sea Alkalinity Pro Test Kit [75 tests]

    Red Sea’s KH\ALKALINITY PRO Reef Test Kit is an advanced titration test, measuring the level of buffers in your reef aquarium to an exceptionally high accuracy of 0.05 meq/l (0.14 dKH).…
    $29.99
  • Salifert kH/Alkalinity Test Kit [100 - 200 tests]

    Salifert kH/Alkalinity Test Kit [100 - 200 tests]

    Measures in sufficient small steps of 0.1 meq/L or 0.3 dKH with a sharp colour change.…
    $20.99
  • Salifert pH Test Kit [50 tests]

    Salifert pH Test Kit [50 tests]

    Sufficiently accurate to monitor pH fluctuations of approx 0.2 pH units within the range 7.4 - 8.6.…
    $13.99
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