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For older model PowerHouse Ballasts
which produces toxins once in the caterpillar's digestive system
Induces flowering and stimulates resinous oil and fragrance production in many flowers and medicinal herbs
277V and 347V plug options are available from Hydrofarm)
Schaefer Versa-Kool High Velocity Greenhouse Fan
12x12x1 Pleated MERV 8 Air Filters 24 Pack nutrient-combo For older model PowerHouse BallastsNordic Pure MERV 8 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 and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters
