Cultiwool 6" x 6" x 4" Blocks of Cultilene Rockwool with Optidrain - Case of 64

Description Unique Cultiwool Growing Blocks: Cultiwools’ growing blocks are efficient in a distinctive manner. They possess a consistent quality that allows for a quick and homogeneous distribution of water throughout the substrate. This trait is among the most crucial for an effective growing medium. Highest Quality Stone Wool: Expect the finest stone wool in the market with Cultiwool. This brand is the first to introduce the ‘donut ring’ for the retail market. Its aim is to further enhance water distribution. Additionally, you'll appreciate its cross grooves intended to foster water flow under the block, and the black/white foil to inhibit algae growth. Improved Waterflow and Disease Prevention: All Cultiwool substrate blocks come with drain grooves at the bottom to boost the water flow underneath the block. This is particularly beneficial when the blocks are placed on cultivation tables and concrete floors. Another advantage of the bottom drain grooves includes limiting the c