Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 1 Pack ventilation The enclosed chamber includes a

The enclosed chamber includes a floating raft hydroponic system with a 32-cell Styrofoam tray

Grow A formulas provide the basis for everything your plants need for vegetative growth

or one zone analog and the other digital

Controller compatible (SOLD SEPARATELY)

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 13 Plus Carbon 1 Pack ventilation The enclosed chamber includes 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. We also carry 4 3 8 and 5 1 4 inch depth filters,