20x25x5 (4 3/8) Lennox X6673_X6675 Replacement Air Filters MERV 14 Plus Carbon 4 Pack Environmental Controllers PPM settings for tomatoes

PPM settings for tomatoes

Mini-Sachets/Sachets on Sticks: Place one sachet or stick per propagation tray or plant

400 gallons of surface sanitizer that will replace a heavy bleach solution (10 ppm)

The unit will stay on all the time unless one of the timer functions is selected

Highly reflective panels redirect photons back to canopy to increase PPFD by 2% versus bar style fixtures

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement Air Filters MERV 14 Plus Carbon 4 Pack Environmental Controllers PPM settings for tomatoesImportant 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,