Grodan Gro Block Improved GR6.5 Small 4" w/Hole, 4" x 4" x 2.6" Strip - Wrapped (Case of 36 Sleeves) Under Canopy This probe is recommended for

This probe is recommended for use with the HI981420 GroLine Hydroponic Nutrients Monitor for pH

This means it will help prevent damage to fan motors

• Multi-purpose air hose delivers air from the pump to the bottom of the bucket

• Control and monitor climate conditions in your grow room 24/7/365 from anywhere

Grodan Gro Block Improved GR6.5 Small 4" w/Hole, 4" x 4" x 2.6" Strip - Wrapped (Case of 36 Sleeves) Under Canopy This probe is recommended forGrodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with Grodans Advanced Wetting Agent. These leading edge blocks have the optimal fiber structure and physical properties for crop uniformity, more