Bonsai Jack 1/4 inch Horticultural Pumice is carefully crushed and screened, then rinsed and dried to the highest standards and meticulously measured; it boasts superior quality and has undergone a range of tests for PH, CEC (cation exchange capacity), bulk density, moisture retention, and evaporation.
Ideal for bonsai, succulents, orchids, and cacti, it can be combined with other components for custom soil mixes. No more than 50% of the raw material is used to ensure quality. Having passed an 18-minute processing session, the bag is inspected and tested in all 50 states and many other countries and is certified accordingly. Easily detect moisture levels–the aggregates turn grey when humid and white when dry.