Horticultural Charcoal by Perfect Plants - 24 Oz. Plant Charcoal - Naturally Cleanses, Flushes Toxins and Excess Moisture from Containers and Terrariums
Mosser Lee 2.25 Qt. Dry Horticultural Charcoal 0810 - The Home Depot
4 Uses for Charcoal and Ash (With Photos) - Dengarden