Natural Horticultural Perlite,has a neutral ph of 7.0, clean and decorative. Adds porosity to soil and soilless mixes ,prevents soil compaction, provides excellent aeration, drainage. Highly durable but does not weigh down roots, does not decompose,stability. Perlite Has Numerous Hydroponic Applications As Well.Holds in the nutrients of your soil,create the perfect environment for your plants. Has many uses around the home and garden. If you have any questions, feel free to contact us! Guarantee a FULL refund if you are not satisfied with our products.