1x Rectangular Capillary Mat suitable for use with Tray2Grow.
During setup, pre-soak your capillary mat and lay it into the Tray2Grow.
Ensure that it is properly tucked into only the two outer channels that run lengthways.
The Capillary Mat wicks the moisture from the tray up to the plant roots above. Always use with a Tray2Grow Root Control Sheet on top.