4 inch Grodan Delta 10 Grow Blocks, Rockwool Cubes, 6 Pack + Twin Canaries Chart

Includes: 6 Pack of Grodan 4" Delta 10 + Twin Canaries Chart Has a tremendous capacity for absorbing nutrient solutions while retaining plenty of oxygen for rapid plant growth Even, rapid water distribution throughout the media Very controllable, so growers are able to steer plant growth Usable in recirculating systems from first drain, reducing water and fertilizer usage Uniform growing substrate which results in consistent plant growth Inert, meaning it will not add or hold back any nutrients or water from the plant Lightweight, pathogen-free, disease-free, seed-free Excellent buffer and re-saturation capability