Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan microbial fertilizer and starter sheets is by

and starter sheets is by far the best on the market with superb air to water ratio and a fibre structure that holds water longer and has less resistance for the roots to grow in

and works with 1000W Interlux Double Ended lamps (and most other brands)

• Use on vegetables

In hot weather its best to spray in the morning or evening because dwell time determines effectiveness

If your Ph is getting too high

Duct Fan Silencer 4 - Duct Fan Silencer for 4" Duct Fan microbial fertilizer and starter sheets is byA duct muffler designed for use with inline fans in grow tents, bathroom fans and other HVAC applications. Features dual aluminum flanges to help absorb sound waves from fan vibrations and airflow. High quality neoprene foam in an egg crate pattern that will reduce fan noise by up to 50%. Galvanized steel body that is corrosion resistant and can withstand extreme temperatures. Duct Opening Diameter: 4 inches Length: 15 inches Weight: 2. 30 pounds