Grodan Pargro QD Biggie Block with Hole, 6" x 6" x 6" - Case of 64 Timers Active Ingredient: Isopropyl alcohol 99%

Active Ingredient: Isopropyl alcohol 99% by volume

Keeping your pH and EC dialed in is an essential component of any successful indoor grow

Box Contents: 50 Black and Clear Vacuum Seal Bags

Mix 1 teaspoon per gallon or 1 cup per 50 gallons

Coco Perlite consists of a blend of 70% high-quality desiccated coconut husk (coir) and 30% perlite

Grodan Pargro QD Biggie Block with Hole, 6" x 6" x 6" - Case of 64 Timers Active Ingredient: Isopropyl alcohol 99%Pargro Quick Drain Stonewool Grodan Pargro line has been modified to be the driest value priced Rockwool on the market. Pargro is the leader among affordable horticultural Rockwool. There are other brands that offer the same low price, but you end up sacrificing quality. Not with Pargro! Since it is made right in the Grodan factory, you can be assured of a high quality product at a great price. Pargro Quick Drain (QD) blocks are up to 14% drier than