• picture of a Active Air Indoor-Outdoor Thermometer with Hygrometer which is self-standing and has four buttons and LCD display
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    This large display Indoor-Outdoor Thermometer with Hygrometer shows current temperature and humidity levels, and includes a remote probe for second zone temperature. Records high and low points for both temperature and humidity.  
  • Photo of blue probe with flip top cover, button, and digital display
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    Stop wasting time struggling with a color chart. Get accurate water testing results with our simple handheld colorimeter.  Our freshwater alkalinity colorimeter brings you more precise technology from your standard chemical test kit. With direct digital freshwater alkalinity results, our handheld colorimeter eliminates the hassle of color matching.
    • The small size of our handheld colorimeter makes it portable and fits perfectly in your pocket.
    • Results are achieved easily with a simple, one-button operation.
    • Easy operation and direct results make measurement quick.
  • Picture of a small 30ml bottle of alkalinity reagents
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    The HI775-26 are the replacement reagents for the HI775 Freshwater Alkalinity Checker® HC. Alkalinity Reagents for fresh water are to be used with the Alkalinity Checker HC.  
  • Photo of yellow probe with flip top cover, button, and digital display
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    Start getting accurate water testing results with our simple handheld colorimeter. Our ammonia colorimeter makes it easy to gain more confidence in your measurements. By bridging the gap between ammonia test kits and advanced instrumentation you no longer have to rely on the human eye to determine colors. Our handheld colorimeter eliminates the trouble of matching to a color chart by providing a direct digital ammonia result.
    • Our handheld colorimeter is portable and easily carried in your pocket.
    • Achieve your ammonia results easily with a simple, one-button design.
    • Don’t worry about matching the right color, our colorimeter does it for you.
  • Picture of three bottles, two large and one small for a High Range Reagent Refills for Ammonia.
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    The HI707-25 are the replacement reagents for the HI707 Nitrite Low Range Checker® HC.
  • Photo of yellow probe with flip top cover, button, and digital display
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    Simple, accurate, and cost effective way to measure low ranges of ammonia in fresh water!  The Checker HC uses an adaptation of the ASTM Manual of Water and Environmental Technology, D1426-92, Nessler method. The reaction between ammonia and reagents causes a yellow tint in the sample.  
  • photo of two low range ammonia checker reagent bottles
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    The HI700-25 Ammonia LR Checker® Reagents are the replacement reagents for the HI700 Ammonia Low Range Checker® HC.
  • Photo of small plastic bottle of API Ammonia Reagent Bottle #1
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    Highly recommended for all aquaponic systems! API reagent for Ammonia bottle #1 and #2. Testing water parameters weekly helps prevent invisible water problems that can be harmful to fish. Fish continually release ammonia into the aquarium through their gills, urine and solid waste.
  • picture of the API Freshwater Master Test Kit
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    This kit tests water for five different parameters that affect the health of freshwater fish. The kit can complete up to 800 tests.
  • Picture of a box containing a test for water gh and kh.
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    The best way to keep your aquarium clean is to maintain good water quality. This will keep your fish strong and vibrant, as well as preventing disease.  Helps to buffer swings in pH that are dangerous to your fish.

  • Picture of a box of KH hardness testing kit from API
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    Keep your fish healthy and thriving by testing your aquarium water's KH levels regularly with this easy-to-use API CARBONATE TEST KIT for freshwater aquariums. API CARBONATE HARDNESS TEST KIT helps prevent pH problems by stabilizing aquarium pH in fresh and saltwater aquariums. Fast, easy, and accurate testing evaluates KH levels in aquarium water, so that they may be corrected if too low or high. Water with low KH is susceptible to rapid pH shifts, stressing fish and increasing the risk of disease.
  • Picture of a pH test kit with bottle, test tube, and freshwater pH color card
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    For when you need a replacement in your main test kit! A fast and easy way to monitor the pH of your aquaponics system. Just three drops in a vial of system water, shake, and read.
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