Backdraft Damper - Spring-Loaded One-Way Airflow Valve pH Perfect Grow Use Clearex with every one

Use Clearex with every one to two reservoir changes

Powerful bait that is highly attractive to slugs and snails

By using naturally occurring plant and biological compounds

The colors are naturally derived and are light

The plant is healthier and the overall results with Fish Sh

Backdraft Damper - Spring-Loaded One-Way Airflow Valve pH Perfect Grow Use Clearex with every onePrevent reverse airflow and protect your ventilation system with this professional grade spring loaded backdraft damper. Engineered with high quality steel and lightweight aluminum, this one way valve ensures air flows in only one directionkeeping bugs, odors, and contaminated air out of your grow room when fans are off. Why You Need a Backdraft Damper When your exhaust fan shuts off, negative pressure can draw outside air, bugs, and untreated odors