Exo Terra Sub Stratum - Bioactive Volcanic Substrate - 4 kg (8.8 lb) Filter Insert Cut out in the back

Cut out in the back for wires and/or tubing

REGENERATION: Soak in a non-metal container with 2 cups of water and 1⁄2 cup of muriatic acid (available with pool supplies: PAY HEED TO WARNINGS on acid container

Size ranges from 1-20 μm to feed a broad range of tropical marine aquarium filter feeders and invertebrates

Water testing is an important part of boosting and maintaining tank health to ensure optimal aquarium conditions

Exo Terra Sub Stratum - Bioactive Volcanic Substrate - 4 kg (8.8 lb) Filter Insert Cut out in the back3 Ways to use Sub Stratum: As a sole substrate As a drainage layer Mixed in with other substrates Sole Substrate When Exo Terra's Sub Stratum is used as the sole substrate, add a layer of 2,5 5 cm (1 2 in) to the terrarium. The live bacteria will activate when the substrate comes in contact with water or waste. The organic matter such as left over food and animal waste will decompose over time. The absorbing properties of volcanic ash will eliminate