Grodan Uni-Slab, 9.5" x 8" x 4" (Case of 16) co2 Precise Speed Controller: The speed

Precise Speed Controller: The speed controller allows you to set the duct fan's speed between ten speed levels optimal for noise and airflow levels in various environments

It fits on either the ONA Gel Pail or ONA Gel Jar (both of which are 4 liters/1 gal)

steel shutters

Robust and Humidity-Resistant: Crafted with a blend of steel and aluminum

This conversion ensures reliable communication and precise control over your lighting schedule and intensity

Grodan Uni-Slab, 9.5" x 8" x 4" (Case of 16) co2 Precise Speed Controller: The speedGrodan Uni Slab, 9. 5" x 8" x 4" (Case of 16) The Grodan Uni Slab combines all the benefits of our traditional slabs with the versatility of a block. Great stability for any size plant. The UNI SLAB is completely wrapped thus keeping all the roots of your plant safely contained within the slab, protected from light and outside contaminants. Yet it's small enough to be maneuverable, allowing your plants to be spaced as the plant canopy requires. The