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Stealth RO100/200
increased air porosity and lower water retention
1 second on/off
Treat plants to vitamin B1 and a multitude of rich
and Evaporative coolers
Duct Fan Speed Adjuster Commercial Humidifier Stealth RO100/200Hydrofarm's Fan Speed Adjuster was designed especially for centrifugal fans. This means it will help prevent damage to fan motors, ensuring longer life. (Meant for use with brushless motors, and all Hydrofarm inline fans, not booster fans) It will correctly and precisely adjust the speed of centrifugal fans. These controllers are more sensitive than any on the market, and are compact and built to last. Features Internal electronic auto resetting
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