Grodan Uni-Slab, 9.5" x 8" x 4" (Case of 16) co2 The Original and Silver Bullet

The Original and Silver Bullet are the best industrial trimmers on the market

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

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

the Bluelab Pro Controller manages pH

Grodan Uni-Slab, 9.5" x 8" x 4" (Case of 16) co2 The Original and Silver BulletGrodan 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