Help Needed: Mold growing in dirt

[DonLisk]

Well, sorry to start this off on a bad note but you need to separate the green tree frogs from the wild caught chorus frog. Both have different toxins that secrete from them as they travel the tank and soak in the water, The cross contamination will slowly over time poison the other as they absorb this while living in the confinement of a tank.

With no drainage layer your soil is probably pretty wet, your humidity can't be guessed so you need a hydrometer which are anywhere from 5 to 10 dollars at a pet shop. I don't think you would be as low as 25 percent and have wet soil with mold on it so get a hydrometer.
If you are using a screen top you will lose humidity through that top, partial covering of a screen top will help retain humidity. Lighting also burns off humidity and heat lamps even more. Using a Compact Florescent over an incandescent will help reduce the humidity loss as long as your able to keep proper temperatures for the frogs.

As for getting rid of the mold, I'd pull the soil that moldy, get a drainage layer in, and some new soil above that.

[NetworkLabs]

So what your saying is that Sugie (Spotted Chorus Frog) can kill Snoopy and Peeper ( American Green Tree Frogs)?!?!
Darn it! Poor Sugie! She'll be going' back into the 5gal until I can get her a 10gal...
Thanks for the information! I was wondering why my frogs were acting a little weird!

[DonLisk]

I'd rinse off any wood or other accent items in with the Green Tree Frogs once you get the Chorus moved out. Always seems good when we can keep them together but it will eventually end sadly when they start to become ill and for no reason.