Advertisement I'm preparing a new vivarium for my avic avic and in doing so prepared about a quarter of a brick of Eco Earth substrate. Me being new to the hobby, I overestimated the expanding power of the substrate and it was nearly mud. I balanced it out by adding more and more of the brick until it was more like soggy earth than mud. Anyone know how long I should bake it in the oven and at what temperature? There's about 1 gallon of it and I have cookie sheets at my disposal.