[Michael Shrom]

I would think rotting leaves from your tanks would be a no no if you mean tanks with frogs in them. You could spread problems quickly like this. I like yeast but have used leaves, cous cous, and rice.

I used to have some real stinky cultures that did great on leaves and cous cous. They got mites and fungus gnats eventually. I seem to have less problems with a drier medium and active yeast.

 

[Michael Shrom]

If you collect food or leaves from a tank with frogs in it you can spread disease that way. If the frogs in the tank have some disease you could spread that throughout your collection by taking things from one tank and putting them in other tanks.