HDE Grower's Toolbox- Digital pH Meter and TDS Water Temperature Purity Salinity ppm Pen for Hydroponic Pool Aquarium Fish Tank Water Quality
Ensure you water is up to par with these two different water testing tools. Measure total disolved solids and pH level in liquids w/ this handy bundle.
HDE is a registered trademark and is the only authorized seller of HDE branded products
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