Grodan Improved Gro-Block GR4 Strip 3" x 3" x 2.6", with Hole | Case of 48 Deep Water Culture | DWC Connect your phone or mp3

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Use after the vegetative stage or transition period when plants are ready for a stronger phosphorus and potassium bloom formula

Ideal for users that do not calibrate frequently

Contains: Canadian Sphagnum peat moss (75-85%/volume)

Ext + Filter + Light Baffle :

Grodan Improved Gro-Block GR4 Strip 3" x 3" x 2.6", with Hole | Case of 48 Deep Water Culture | DWC Connect your phone or mp3Grodan Improved Gro Block GR4 Strip 3" x 3" x 2. 6", with Hole Grodan's Improved Gro Blocks utilize improved hydrophilic technology and density for better water distribution and root development. Non Shrink Wrapped. Available with pre cut holes for easy planting. Block Size: 3in x 3in x 2. 6in Strip Size: 24" x 3in x 2. 6in. Blocks Strip: 8