We know that preparing an ABG-type substrate or an ultra-rich homemade mix (vermicompost, sphagnum, biochar) is the key to a healthy colony. But did you know that introducing your microfauna into a fresh substrate that hasn't been soaked with water beforehand can cause a complete crash in less than 48 hours?
This is why initial watering is not optional but a technical necessity:
- The "Dry Sponge" effect: Unmoistened peat moss and activated charcoal act like industrial desiccants. They instantly absorb the isopods' body moisture.
- Mechanical asphyxiation: Isopods breathe through modified gills under their abdomen. They need a thin film of liquid water to capture oxygen. In dry soil, peat and charcoal dust stick to them and block them.
- The gas trap: A rich and dry substrate allows gases and volatile organic compounds to circulate freely. The initial water acts as a physical "filter" to stabilize the environment.
The golden rule for your culture tanks:
1. Prepare the mixture.
2. Water generously (the substrate should have the texture of a wrung-out sponge: moist but not soaked).
3. Stir to stick the dust to the ground.
4. ONLY AFTER that, introduce the microfauna.
Even better: prepare your tanks 1 to 2 weeks in advance to let the micro-ecosystem stabilize!

