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If your tap water is over 200 ppm or contains calcium above 70 ppm
Conductivity kit contents: instructions
This cutting tool with a black finish
and ideal for use with water-based systems or soil-less growing mixes like Root Farm Hydro Potting Mix
7cm or 16 1/32in
Blue Jay In/Out Suction Cup Window Thermometer Hangers If your tap water isBlue Jay In Out Suction Cup Window Thermometer Mounts to window without blocking view Weather Resistant Easy to Read Scale
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