Allows a rockwool user to seamlessly stack a 4 in cube on top of a 6 in cube or a 6 in cube on top of a 8 in cube—blocking light and eliminating algae, all while allowing in the necessary air a plant needs to thrive.
Grodan Classic Slab 30/75 12 in x 3 in x 36 in (8/Cs)
Grodan Delta 6.5 – 4 in Block 4 in x 4 in x 2.5 in w/ Hole (36/Cs)
Grodan Expert Slab 20/75 8 in x 3 in x 36 in (12/Cs)
Grodan PRO Delta 6.5 – 4 in Small Unwrapped (36/Cs)
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