Grodan Gro Block Improved GR10 Large 4" w/Hole 4" x 4" x 4" Strip, (case of 144 blocks) MH Feed rates vary by media
Yard notes & kiln story
Description
Grodan Gro Block Improved GR10 Large 4" w Hole 4" x 4" x 4" Strip, (case of 144 blocks) MH Feed rates vary by media Feed rates vary by media type and can be used in dilute or concentrated sprinkler or injector systems