Toxin buildup is not a myth. Maybe it does get diluted by the water, but i have read many posts of people who inadvertantly kept their fire bellies with other frogs and the toxins have killed or seriously harmed the other frogs. (were talking seizures, paralysis, death)
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I think my frog owns a megaphone....
White's tree frogs : 1:1
Mantella viridis : 1:3

