Testing Equipment for Saltwater Aquariums, HM Digital, Inc., $35-$75

Aquarium supplies for your fish tanks, reef tanks and water gardens.

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Aquarium Supplies

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HM Digital PH-80 Handheld Digital pH Meter

The PH-80 is an economically priced, reliable pH meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Featur...

$59.99

HM Digital COM-80 HydroTester EC/TDS Meter

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EC/TDS/Temp Water Resistant Hydrotester The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, d...

$45.50

HM Digital Waterproof EC / TDS / Temp Combo Meter

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COM-100: Waterproof EC / TDS / Temp Combo Meter Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools &a...

$59.99

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