55 gal Drum with Pre-Drilled Locking Lid cloning-and-seed-starting It is supplied with two

It is supplied with two probes: a stainless steel

units come with battery

• Chlorophyll B is absorbed strongly at 460 nm

even in a media void of organisms

55 gal Drum with Pre-Drilled Locking Lid cloning-and-seed-starting It is supplied with twoThis 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