PURE SUBSTRATES Max Air 0.75 Gallon Grow Block - Power MP (Case of 62) rockwool no problem we’ve thought about

no problem we’ve thought about that too

Requires additional effort to force a square plug into a round hole

greenhouse

carries an EPA registration number

Non-leaching

PURE SUBSTRATES Max Air 0.75 Gallon Grow Block - Power MP (Case of 62) rockwool no problem we’ve thought aboutPURE POWER MP (Medium Porosity) Max Air 6" Grow Block Clean. Consistent. Predictable results. Simply the best quality coco you will ever try. RHP Certified Designed and tested in Holland to the absolute highest horticultural standards on the planet, the substrate and the factory are RHP certified for premium quality. PURE Power MP (medium porosity) 6" blocks are produced with only the highest quality raw materials. We do not use the "waste" product of