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77 EC calibration solution (50ml bottle)
Engineered for moisture retention and aeration for optimum rooting and growth
With an interchangeable outlet fitting
±70 ppm (700 ppm) (@ 1940 ppm) and ±1ºC / ±2ºF
Certified by NSF to NSF/ANSI Standard 60 for Drinking Water Treatment Chemicals
Active Aqua 55 Gallon Drum with Pre-Drilled Locking Lid Insecticides 77 EC calibration solution (50mlThis high quality 55 gallon drum is black in color and comes with a pre drilled solid cover and bolt ring closure. It is perfect for use as a reservoir for larger hydroponic systems. The pre drilled holes can be used for the grommets and barbed fittings necessary to outfit the drum with tubing for filling and draining. A larger hole can also be cut in the cover to act as a port for adding nutrients, checking pH, etc. Features 55 gallon nominal