Check the listing for details. Perlite, Seed Starting, Hydroponics, Potting, Medium Size #2. Condition: New. Listed at 5.95 USD. Bay 2350 finds high quality agricultural products for our growing operations and offers them to customers at competitive prices. This perlite is an OMRI listed product, the Certificate is attached Termolita manufactures this perlite in Northern Mexico. They are within the top twelve perlite manufactures in the world. The specific item for sale: Organic Horticultural Grade Perlite - 1 Gallon (approximately 14 cups)It's packaged in a resealable gallon sized plastic bag. This is considered a "Medium" size (number 2). This is a lightweight soil conditioner used in: Potting Mixes, Hydroponics, and Garden soil Improves drainage, provides air to roots, does not change soil ph, loosens heavy clay soil. Custom potting soil - Mix 30% - 50% with peat moss, or compost, or special soil. Hydroponics - 100% perlite or mix with organic substrate Root cuttings - 50% perlite w/coco peat or peat moss Seedlings - 30% - 50% perlite with cocopeat or peat moss Returns are accepted in accordance with Ebay policies, and at no cost to the buyer.