Test Tube pH Pens Please Select an Option::850066 | Test Tube pH Pen w/Flat Tip it can be used from

it can be used from seedling to harvest

Lower Maintenance: EFI systems generally require less maintenance than carbureted systems

Made from Extra Strength recycled plastic

Biomend Plus combines beneficial bacteria

Place plant into the planting hold and backfill with soil

Test Tube pH Pens Please Select an Option::850066 | Test Tube pH Pen w/Flat Tip it can be used fromFits standard test tubes 16 x 50 mm or larger. Highly stable and accurate readings with a large LCD display. Designed for simple one hand operation. Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize some other non standard buffers as well. Features hold function, and auto power off with low battery indicator. General Purpose Glass Probe: EPA compliant for labs and wine Penetration Probe: for food & soil Flat Tip