The smell is the first indicator, die off will stink.
If the rock came from anywhere other than precured from your LFS
, consider it uncured. Even the if adding precured to an excisting system, I would at least qt
it for a few weeks. Put it in a container with a ph
and a heater and monitor ammonia and nitrite. When both levels reach zero and stay there for a few days, it is cured. If its a new system, you can use the rock (cured or uncured) to cycle a tank.
Is yours a new system with no livestock?