16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack Pots and Containers soilless mixes or hydroponic systems

soilless mixes or hydroponic systems

Large volume sizes of PBH Rice Hulls also available

That’s why our team is constantly in the lab expertly engineering products that do the hard work of balancing the environment for you

HI98100 Checker Plus pH Tester

Versatile formula for foliar or soil applications

16x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 1 Pack Pots and Containers soilless mixes or hydroponic systemsImportant 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,