GROW!T Super Coarse Perlite, 100 L/3.53 cu ft growersedge An air filtration kit with

An air filtration kit with everything you need to cool

They are approximately 13×8 micrometers in size

Power cord: 16"

4" wide mouth opening for easy filling and cleaning

This combines the best of both worlds with the end result being a ballast that runs 15% cooler than any other digital ballast available

GROW!T Super Coarse Perlite, 100 L/3.53 cu ft growersedge An air filtration kit withProduct Details Perlite is a unique volcanic mineral which expands from four to twenty times its original volume when it is heated. Perlite can reach temperatures of approximately 1600 1700 degrees F. The media's expansion is due to the presence of two to six percent combined water in the crude perlite rock, which causes the perlite to pop in a manner similar to that of popcorn. When expanded, each granular, snow white particle of perlite is sterile