20x25x5 1/4 (5.25) Goodman/Carrier/Amana Replacement MERV 12 Air Filters 2 Pack Lamps Silica strengthens cell walls and

Silica strengthens cell walls and gives plants sturdy stalks and stems to support flowering sites

Hanna suggests cleaning the bulb and junction of your electrode on a regular basis to ensure that the probe is always clean and prevent any clogging of the junction

• Integrated socket & 15' lamp cord

User-defifined Grow Schedules and Spectrum for Specifific Strain

Get more ballast for your buck with the SG ballast

20x25x5 1/4 (5.25) Goodman/Carrier/Amana Replacement MERV 12 Air Filters 2 Pack Lamps Silica strengthens cell walls andImportant 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 4 7 8 inch depth filters,