Summary: Multi-Functional Use: These black lava rocks are versatile and can be used as soil additive or top dressing for various plants, as well as in aquariums, terrariums, and fish tanks. Natural Stone: The rocks are natural black lava with no dyes, maintaining their color over time, and may have some dust from transportation. Porous Rock for Drainage: The volcanic rocks offer quick drainage for plants while retaining moisture and providing stability. Wash Before Using: It is recommended to wash the rocks before use to ensure cleanliness and smoother surface. Package Contents: The package includes 5 lbs of black horticultural lava rocks in a resealable ziplock bag, with an average size of 0.2″-0.3″ (5mm-8mm).
