It doesn't have the rotten egg type smell that I have had for the frogs in a bad setup. And now that I tried to mask it with apple cider smelly things I can't remember the smell. It just had a musky dirty odor to it. I am tearing the 40B down tomorrow and turning it vertical. Bombinas are going back into the 20L.

Do Leo's produce an odor? They are my first herp so I have no idea if it is just them. I completely replaced the substrate as well but I don't know if the calcisand is producing the smell from the moisture.

What a pain. I have never had tank odors before At least this means I have more room for my Phyllomedusa tomopternas