Growing Mediums
The growing mediums used in a hydroponic growing system are there for two reasons. One is to anchor the roots, the other is to allow air to circulate freely through the medium and around the root system. They do not provide any nutrient to the plant. 

Rockwool

Rockwool - Rockwool is most commonly used in drip irrigation systems and for starting seedlings and clones. For those of you unfamiliar with the usage of rockwool, here's a quick run-down. After the plant begins to grow in the starter cube, it is then placed into a 3" or 4" cube to continue growth. The 3" or 4" cubes may then be placed on rockwool slabs for further root growth. Typically, all three (starter cube, cubes & slabs) are used.

Item Price Quantity
98 Starter cube sheet (for seeds & cuttings)  $     9.95
98 Starter cube sheet - Case (2,940 cubes) $ 279.95
Individually wrapped starter cubes
(MM40/40) - 100		 $   11.95
3" blocks with hole
(DM4G) - 16 blocks 		 $     7.95
4" blocks with hole 
(DM6.5) - 12 blocks		 $     9.95
4" x 4" x 4" blocks with hole
(DM10) - 12 blocks		 $   14.95
Slab  - 36" Long x 6" x 3" $     6.50
HUGO 6" x 6" x  6" with hole $     2.25 ea

Aggregate & Net Pots

Aggregate & Net Pots - Net Pots can be used in just about any type of hydroponic system. These pots are filled with clay aggregate which is used for root support.


 
 

Item Price Shipping Quantity
Geolite - 50 lb. bag
(Irregular shaped clay aggregate)		 $ 39.95 $10.00
Geolite - 15 lb. bag
(Irregular shaped clay aggregate)		 $ 18.00 $  5.00
2" Net Pots - 1-50 $     .18 $  5.00 
2" Net Pots - 51-100 $     .18 $ 10.00
3" Heavy Duty Net Pots  1 - 50 $     .90 $   5.00 
3" Heavy Duty Net Pots  51-100 $     .90 $ 10.00
5 1/4" Heavy Duty Net Pots 1-50 $   1.50 $ 10 .00
5 1/4" Heavy Duty Net Pots 51-100 $   1.50 $ 16.00

 


 

Coconut Fiber

Mix 50/50 with Grorox. It is an organic medium which offers top performance in hydroponic systems. The grade of coconut fiber offered by the "Grow Room" is the only grade that can be used by Dutch farmers who have to purchase crop insurance. Beware of lower grades because they are high in sodium.
 
 
 
Item Price Shipping Quantity
Coconut Fiber
(4" x 3" x 8" Brick)
(pieces expand by 9x's when wet)		 $4.95 $4.95

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