HM Digital Waterproof Professional Series pH/EC/TDS/Temp Meter Controller each available in a convenient

each available in a convenient dispenser pack

Hygrozyme provides a cleaner root zone by accelerating the breakdown of dead root matter

digital thermometers can measure the temperature of many substances from air to liquids to surfaces—all electronically

Heavy Roots is a revolutionary new additive designed to enhance the rhizosphere on all levels

3 3/4" barbed elbows

HM Digital Waterproof Professional Series pH/EC/TDS/Temp Meter Controller each available in a convenientDescription COM 300L: Waterproof Professional Series pH EC TDS Temp Meter The COM 300L is a professional grade level pH EC TDS Temp meter ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, aquaculture, colloidal silver, labs and scientific testing, pools and spas, ecology testing, boilers and cooling towers, water treatment and more. Features Measures Potential Hydrogen (pH), Electrical