LECA (lightweight expanded clay aggregate) is a great filler material for the drainage trough of our Selva and Amazonia vivariums. It takes approx. 1 qt (1Litre) of LECA to fill the trough to the correct level. One order is 1 quart, or approximately 1 lb.
LECA is nearly half the density of calcined clay and about the same density as horticultural charcoal, so it’s an ideal substrate option for filling the trough if you don’t want to culture springtails or other feeder insects. We recommend covering LECA with a material such as horticultural fabric or synthetic screening to prevent smaller-grained substrate materials from filtering down into it.
Substrate materials are shipped using appropriately sized USPS flat-rate boxes.