Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool, 3.5 cu ft lighting-&-electrical-components 50/60Hz Certifications ETL/FCC 3-in-1 (Temp/Humid/CO2)

50/60Hz Certifications ETL/FCC 3-in-1 (Temp/Humid/CO2) Sensor Max 1pc per set

Used by more pro growers than any other brand so you can grow with confidence

From towering racks to multi-tiered rolling tables

Tube Types: E-tubes or F-tubes (selected by model)

Grodan Gro-Wool Medium Water Absorbent Granulate Rockwool, 3.5 cu ft lighting-&-electrical-components 50/60Hz Certifications ETL/FCC 3-in-1 (Temp/Humid/CO2)Granulated rockwool can be used alone or as an amendment to organic based mixes. For example, the addition of water absorbant granulate to peat mixes at 25 50% volume increases water holding capacity and aeration, improving plant growth and shelf life. The water repellent granulates are superior substitutes for aerators such as perlite or Styrofoam. The granulate is prilled for easy mixing. Granulated rockwool as potting mix: When you use granulated