Grow Sponges vs Rockwool vs Horticubes: Which Costs Less and Which Actually Grows Better?
OEM pods cost $1.55-$2.67 each. Rockwool runs ~11¢, horticubes 5¢. Full cost breakdown + which media actually grows better by plant type.
Hydroponic Grow Sponges Alternatives Rockwool Horticubes