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Originally Posted by ishkaboo  What exactly are those brown balls on the bottom called?
Those look like a godsend compared to messy ass perlite.... do they keep the RH as high as perlite? |
If that's what I believe it is, than it's called hydroton. It's derived from clay and, like perlite, is extremely porous. It's supposed to expand a bit when fully hydrated. I couldn't tell you how well it holds water though, as I've never used it, though I had planned to use it for a water resevoir area in the lower part of a vivarium, so I have no doubt that it's capable of holding water.