16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 13 Plus Carbon 2 Pack Hydro Components PRO-MIX HP MYCORRHIZAE™ is a

PRO-MIX HP MYCORRHIZAE™ is a high porosity peat-based growing medium containing

This system focuses 20% more of the light to the target area than our nearest competitor to enhance the performance of the lamp and maximize plant quality and yield

Performance of combustion chamber¹: 23 kW / 30

lowering your electricity bill without sacrificing yield

T-Rex is to be used in the first 1-3 weeks of the vegetative cycle

16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 13 Plus Carbon 2 Pack Hydro Components PRO-MIX HP MYCORRHIZAE™ 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. We also carry 4 7 8 and 5 1 4 inch depth filters,