I'm working on a project for our biology class, and I understand that we need to have several layers on the bottom of the enclosure, including Hydroton, charcoal, and organic soil. What I'm wondering is, what do we need to do with the charcoal layer? Should it be crushed up or not, and is there any particular brand I should use in the habitat?
Also, I'm doing a rock wall background in the tank out of Styrofoam, and our teacher told us we needed to seal it. What sealant should I use for this job?
Also, I'm doing a rock wall background in the tank out of Styrofoam, and our teacher told us we needed to seal it. What sealant should I use for this job?