Grodan Delta Grodan Slabs

$6.95

Delta Grodan Slabs

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen for rapid plant growth. Grodan comes in graduated sizes. Seedlings started in cubes are easily transferred to blocks and then onto slabs, if desired. Seedlings or cuttings started in the Grodan cubes can also be transplanted into more traditional planters and growing mediums.

Grodan Slabs -The final stage of planting with growing blocks are the Grodan slabs. These slabs come in clearly marked UV resistant poly sleeves for ease of use. Recommended for larger, long term crops with extensive roots like peppers, tomatoes, or cucumbers. Typically, seedlings in blocks are placed onto slabs. Grodan Expert is the slab that drains the fastest because of its vertical fibers. By far the most popular slab for the hydroponic hobbyist market. Grodan Master is a special wet/dry slab. The top layer is thicker, which stays wetter, while the bottom layer stays drier. In effect it defies gravity, allowing more even distribution of moisture throughout the slab.

Grodan Expert: The slab that drains the fastest because of its vertical fibers. These are our most popular slabs and the ones we recommend for home hobby use.

Grodan Classsic: The slab that stays wetter because of its horizontal fibers. Best for hot climates and situations where less frequent watering is a requirement.

Grodan Master: The special wet/dry slab. The top fiber layer is horizontal and stays wetter, while the bottom layer is vertical so it stays drier. By placing the fiber mix like that, the slab in effect defies what gravity does to water, allowing more even distribution of moisture throughout the slab.
This slab is only recommended for people with years of experience growing in Grodan slabs.

These slabs come in clearly marked biodegradable UV resistant poly sleeves.
The poly sleeves have several functions;

Comfort in handling.
Preventing algae growth.
Preventing roots and diseases from moving easily from slab to slab.
Minimizing evaporation.
Enabling full saturation of the slabs before use.
Controlling/directing the water-run off from the slabs.

Below the table you will find details about the properties of each kind of slab.

Gro-Slabs	Size in inches	Slabs/pack
Expert 15/75 6� slab	6� x 3� x 36�	12
Expert 20/75 8� slab	8� x 3� x 36�	12
Expert 15/100 Fat 6� slab	6� x 4� x 36�	9
Classic 30/75 12� slab	12� x 3� x 36�	8
Classic 15/75 6� slab	6� x 3� x 36�	12

The diagrams on the slabs are simplified illustrations of the fiber direction in the slabs:
	Vertical fibers - water moves fast through the fibers
	Horizontal fibers - water moves slowly through the fibers

Purchase Grodan Delta Grodan Slabs

Select: Expert Slab - 36" x 6" x 3"; Expert Slab - 36" x 8" x 3"; Classic Slab - 12" x 3"; Expert - 36" x 6" x 3" (Case/12); Expert - 36" x 8" x 3" (Case/9); Classic - 12" x 3" (Case/8)

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