Hydroponics Growing Medium, Coconut Husk Chips (fresh water washed), Coir, Charcoal, AAA Grade New Zealand and Chilean Sphagnum Moss, Large Perlite, Diatomite, New Zealand Pine Bark, Fir Bark, Tree Fern Fiber/ Nuggets, Red Wood Fiber (Gorilla Hair), Rockwool cubes (Grodan), and Expanded Clay (Hydroton)