Botanicare Reservoir -- 40 Gallon Resevoir Bottom - White In-Line Duct Fans + Accessories Calibration of the pH is

Calibration of the pH is simple with the push buttons on the meter and fresh calibration solutions

Each pack is individually overwrapped with an HIC to ensure freshness and comes with a replacement indicator card for easy use

and there is no wrapper to reseal a single one

Height when full of water: 29

Botanicare Reservoir -- 40 Gallon Resevoir Bottom - White In-Line Duct Fans + Accessories Calibration of the pH isNOTE: Porthole covers and lids are sold separately. Designed for performance and easy maintenance. Original Reservoirs include front and side bulkhead ports to accommodate an external pump and allow multiple reservoirs to be joined in line or side by side. Made in the USA using renewable solar energy. Made with recycled and recyclable materials. BPA free. These features eliminate the need to remove the lid when adding nutrients. Made in the USA.