Grodan Uni-Slab Improved 8 Inch x 4 Inch x 9.5 Inch (Case Of 16)Grodan Improved Uni Slabs offer a wide control range to steer your crop using irrigation strategies. Featuring the Advanced Wetting Agent, Uni Slabs offer more uniform WC and EC distribution throughout each slab and from slab to slab. Fast rooting and vigorous growth throughout the entire growing cycle improve cannabis plant health, better resilience and higher yields. The improved slab structure and physical properties guarantee rapid resaturation