LECA (Light Weight Expanded Clay Aggregate)
LECA is used as a false bottom when building you Vivarium. Simply place a minimum of 2 inches of LECA in the bottom of your Vivarium then place a light weight barrier (fabric weed barrier or nylon window screening works well) Then place your Jungle Soil substrate on that. If you intend to place a water such as a water fall please use more LECA to give enough clearance for you pump to work efficiently.
Jungle Jewel Exotics sells LECA in 4 Liter or 9 Liter bags. A small bag of LECA (4L) will give you a 2 inch base in a 12×12 Vivarium. A large bag (9L) will give you a 2 inch base in a 18×18 Vivarium. If you building a 24×18 Vivarium please use a minimum of a 4L and a 9L bag of LECA to get a 2 inch base. If you intend to use a pump for a water fall in your Vivarium please double up everything to get a 4 inch base of LECA.