Questions About Growing Media



What are Expanded Clay Pebbles?

Answer: Expanded clay pebbles are used in hydroponics as a medium to support the plant. They are chemically inert, do not affect pH and provide excellent drainage. They are made from a special type of clay, which is heated to a high temperature causing it to pop like popcorn.



What is Coco Peat?

Answer: Coco peat is an organic medium made from coconuts, frequently used in both hydroponics and seed sowing mixes. Its advantages are that it is lightweight, relatively inert and comes from a sustainable source. However, coco peat comes in various grades, and can actually be detrimental to plant growth if it contains salt-water residues from poor processing.



What is Rockwool?

Answer: Rockwool is a substrate made by melting rock, extruding it in threads and then pressing it into sponge-like blocks.



What are CocoTek products made from?

Answer: CocoTek products are made from all organic sources. Coconut fibers are spun together with natural tree rubber to form the popular CocoTek products.



What is the difference between Expanded Clay Pebbles and Coco Peat? What are their applications?

Answer: Both Expanded Clay Pebbles and Coco peat are pH neutral media. Expanded Clay Pebbles provide free drainage and aeration, while coco peat provides moisture retention and the ability to hold onto a small amount of nutrients.



Do the rooting media (Pebbles, Rockwool, Coco Peat, etc.) change the way nutrients are used?

Answer: They can. Rinse the growing media (especially important when using Rockwool) before using it. We suggest you check the nutrient solution pH and ppm(see above) and adjust the solution accordingly.



How big does a brick of Coco Peat become?

Answer: One brick expands to approximately two and a half gallons.



Can you recommend a simple solution for keeping particles of smaller growing media from getting into my nutrient solution?

Answer: General Hydroponic's CocoTek Mats were designed to do just that. CocoTek Mats also create a unique air and moisture balance around the net cup. The CocoTek Mats come in two sizes, 4'x8'x1/4" or 4'x4'x1", that can be cut to fit any application.



How do I use Rapid Rooter plugs for cuttings?

Answer: Rapid Rooters work best when in a 50-cell tray. Place a cutting in the small hole on the top of the Rapid Rooter plug enough where the cutting will stand upright on its own. Place the tray under proper lighting, then once multiple roots pop out the cutting can then be transplanted into a hydroponic system or directly into soil.



How do I use Rapid Rooter plugs for starting seeds?

Answer: Rapid Rooters work best when in a 50-cell tray. Drop the proper amount of seeds in the small hole on the top of the Rapid Rooter plug and place the tray in a dark area until sprouting occurs. Then move tray into a lighted area and grow until seedlings are large enough to transplant into a hydroponic system or directly into soil.



Do I need to soak my Rapid Rooter plugs?

Answer: For optimal results soak Rapid Rooter plugs in pure water with a light blooming formula (200ppm or 0.4mS), then place back in tray and follow procedure for cuttings or sees.



Do I need to water my Rapid Rooter plugs?

Answer: Do not water Rapid Rooter plugs unless they are drying out. The plugs are designed to hold the proper amount of moisture and oxygen that is optimal for starting seeds and rooting cuttings.