20x25x4 (3 5/8) Pleated MERV 12 Air Filters 6 Pack propagation trays And the result is a

And the result is a better harvest

Can BotryStop WP be tank-mixed with other products

Pulse Pro is the big brother of the Pulse One

Auto calibration & pH temp

For measuring CO2 levels

20x25x4 (3 5/8) Pleated MERV 12 Air Filters 6 Pack propagation trays And the result is aImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 20x25x4 filter