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especially when high air capacity and extra drainage are required
Grodan Master is a special wet/dry slab
• High-precision microprocessor control
fungus gnats
so it can be fed to all animals to improve their health and size
HM Digital COM-100 Waterproof EC/TDS/Temp Combo Meter grow-light-ballasts especially when high air capacityIdeal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more. The COM 100 is a professional level EC TDS meter at an unbeatable price. Measures electrical conductivity (EC), total dissolved solids (TDS), salinity and temperature. UPGRADED: Four scales: S, mS, ppm, ppt
