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AquaLife® Reefractometer - Measures Salinity and Specific GravityAquaLife® Reefractometer - Measures Salinity and Specific GravityAquaLife Refractometer - The AquaLife Reefractometer is a rugged, lightweight aluminum body refractometer that has all the features and precision of much more expensive models. It accurately reads salinity directly in parts per thousand. The dual scale also reads specific gravity to within ±0.001. This product includes a solid storage case, pipette, cleaning cloth and instructions.
Aquascape® Submersible Pond ThermometerAquascape® Submersible Pond ThermometerMonitor pond temperature throughout the year with the Aquascape® Submersible Pond Thermometer to help adjust fish feeding and water treatment applications during seasonal changes.
biOrb® Heater Pack - Includes Heater, Heater Stand and ThermometerbiOrb® Heater Pack - Includes Heater, Heater Stand and Thermometer

The biOrb® Heater Pack contains a 50W standard aquarium heater capable of heating the water in any biOrb up to 60 liters (16 gallons). The included Heater Stand enables the heater to be fitted securely onto the curved surface of the biOrb, and the included thermometer allows you to monitor the water temperature.

EasyPro Pond & Water Garden ThermometerEasyPro Pond & Water Garden ThermometerThis Pond & Water Garden Thermometer is a dual-purpose thermometer that includes a floater cap. It can be used as a floating thermometer (with cap on) or a sinking thermometer (with cap off). Made from ABS plastic and shatterproof lens, reads in both Fahrenheit and Celsius.
eco pH+ Pen by Trans Instrumentseco pH+ Pen by Trans InstrumentsThe Eco Series pH+ Tester Pen gives fast, accurate, and easy to read pH readings. No more need for test strips or color test kits! This convenient test pen makes it easy to do frequent testing for accurate, safe pH control. Controlling pH effectively helps balance water chemistry, enhance fish coloration, promote spawning and control CO2 levels.
Hikari® Aquarium Solutions® AccuProbe™ HydrometerHikari® Aquarium Solutions® AccuProbe™ Hydrometer
The Hikari® Aquarium Solutions® AccuProbe™ Hydrometer measures a wide range of specific gravity and salinity and is intended for marine aquarium use.

    Hikari® Aquarium Solutions® AccuProbe™ Mini HydrometerHikari® Aquarium Solutions® AccuProbe™ Mini Hydrometer
    The Hikari® Aquarium Solutions® AccuProbe™ Mini Hydrometer measures a limited range of specific gravity and is intended for marine aquarium use.

      Koi Medic Salinity Meter by Trans InstrumentsKoi Medic Salinity Meter by Trans InstrumentsThe Eco Series Koi Medic Salinity Meter is a very accurate, easy to use salinity meter. Simply turn on, dip into pond, and LCD display will display salt content. Includes protective case. Includes (4) 1.5V button cell batteries.
        Laguna Pond Closing KitLaguna Pond Closing Kit
        The Laguna Pond Closing Kit includes all of the needed equipment for the fall and winter months. Kit includes de-icer, aeration pump and air stone, pond netting, wheat germ fish food, and a floating thermometer.

          Lifegard Aquatics E-Z Read Sink or Float ThermometerLifegard Aquatics E-Z Read Sink or Float ThermometerThis ABS molded Fahrenheit/Celsius thermometer has a shatterproof magnifying lens. Includes snap on/off flotation top and 36" rope leash with anchor plate.
          Lifegard Aquatics Pond Tube ThermometerLifegard Aquatics Pond Tube ThermometerThis ABS molded tube case thermometer is sealed in a blown glass tube with both Fahrenheit and Celsius scales. Includes polyethylene rope.
          Nycon Pond Thermometers -- Floating or SinkingNycon Pond Thermometers -- Floating or SinkingNycon Pond Thermometer are easy to read and show both Fahrenheit and Celsius scales, so that you can maintain correct pond temperatures -- an essential part of a healthy pond
          Pondmaster® Floating Pond ThermometerPondmaster® Floating Pond Thermometer
          Pondmaster® Floating Pond Thermometers monitor the temperature in your water feature and can be used in all outdoor pond and water gardens.

            United Aquatics Floating Pond ThermometerUnited Aquatics Floating Pond Thermometer
            The United Aquatics Floating Pond Thermometer is essential for feeding pond fish the proper diet and knowing when to add beneficial bacteria to the pond.

              Versatile Wireless ThermometerVersatile Wireless ThermometerThis versatile wireless thermometer monitors multiple parameters of your pond's environment using a wireless sensor and 6' waterproof probe. The central digital display shows water temperature, indoor temperature, outdoor temperature, indoor humidity and time.
              Water Meter from Complete Aquatics - Measures Flow VolumeWater Meter from Complete Aquatics - Measures Flow VolumeKnowing the actual gallons in a pond is essential when applying water treatments, fish medications or simply calculating fish stocking levels. Use the Water Meter from Complete Aquatics when filling a newly installed pond or re-filling after a cleanout.
              YSI Economy Oxygen Meter with Optional ProbesYSI Economy Oxygen Meter with Optional ProbesThe D200 Economy Oxygen Meter from YSI Meters is designed for quick, accurate oxygen and temperature readings! This handheld, easy-to-use meter features a watertight IP67 housing, so there's no need to worry about the meter getting wet.