In another words, the only condition that exists in a mixed tank and does not in a single species tank is hybridization.
You may have bullying, you have deaths, you have timidness, you have underfeed frogs in both.
Hybridization is the single most stated reason not to mix species. And that is brought up by breeders and people who sell 'pure' breed frogs for a living.
Do people do mixed tanks, yes they just don't tell many people. Is it done at a professional level by experts. Yes
You may have bullying, you have deaths, you have timidness, you have underfeed frogs in both.
Hybridization is the single most stated reason not to mix species. And that is brought up by breeders and people who sell 'pure' breed frogs for a living.
Do people do mixed tanks, yes they just don't tell many people. Is it done at a professional level by experts. Yes