Windowsill Heat Mat 7.3W 120V (3 inch x 20 inch) Canna Maintenance-free gel electrolyte: A cloth

Maintenance-free gel electrolyte: A cloth junction and polymer gel

Reads straight out of the substrate: The stainless penetration probe removes the slurry step

Capacity: Rated for roughly 8

The EC/TDS conversion factor is user selectable as is the temperature compensation coefficient (ß)

Suitable to pump clear water containing particles with diameter up to 0

Windowsill Heat Mat 7.3W 120V (3 inch x 20 inch) Canna Maintenance-free gel electrolyte: A clothHydrofarm's windowsill heat mat is perfect for veteran growers, beginners, and children too. It is the perfect size for small growing spaces, and improves germination by warming the root area 10 20 F over ambient temperature. By warming the roots you increase your growing success as this mat will maintain a controlled temperature all season long. 3" x 20" UL listed Power cord included