Grodan Improved GR40 Uniblock, 8 x 8 x 4, case of 36 Growgles It wires to a 24VAC

It wires to a 24VAC controller at one valve per zone

Angled Barbed Stakes: Secure placement and precise water delivery to the plant's root zone

boasting an Electrical Conductivity (EC) of less than 0

stepping RH down during a cure Composition Plant-based glycerin and water Salt Content 100% salt-free Biodegradability 99% biodegradable Toxicity Non-toxic

100 µmol/s PPF through a double-ended HPS platform with a German aluminum reflector rated above 96% reflectivity

Grodan Improved GR40 Uniblock, 8 x 8 x 4, case of 36 Growgles It wires to a 24VACGrodan Improved GR40 Uniblock, 8 x 8 x 4, case of 36 Growershouse. com is proud to introduce the Grodan Improved Uniblock GR40, the culmination of extensive research and partnerships with top institutions and growers. Created in collaboration with the Wageningen University and Research facility in The Netherlands, and with feedback from leading North American growers, this product represents the pinnacle of stone wool substrate technology. Key