14x18x1 MERV 13 AC Furnace Filters 6 Pack cloning-and-seed-starting Always use equal parts of

Always use equal parts of Athena Bloom A & B to maintain proper mineral ratios

200K natural white spectrum is good for all stages of growing

C Hydroponic Nutrients allow only minimal salt build-up

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14x18x1 MERV 13 AC Furnace Filters 6 Pack cloning-and-seed-starting Always use equal parts ofNordic Pure MERV 13 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200