10x10x1 Furnace Air Filters MERV 10 Pleated Plus Carbon 3 Pack Grow Strong The double Ag/AgCl reference provides

The double Ag/AgCl reference provides less noise (unwanted voltages) than gold or silver electrodes

Transformer for BAS400A

Used by growers for several generations

Hanna's Buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to NBS/NIST primary standard buffer solutions

10x10x1 Furnace Air Filters MERV 10 Pleated Plus Carbon 3 Pack Grow Strong The double Ag/AgCl reference providesNordic Pure 10x10x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material