Ah, so many posts!

Hoppity100,

The frogs, in their natural environment, had lots of submerged wood where I caught them, and the frogs there thrive, so I doubt submerged wood will hurt them. [They are indeed WC, but since they are invasive frogs, you're supposed to kill any you catch. Instead, me and my friend let them go, except for Gnag and Bumpy, of whom I decided to keep on my birthday.]

Bill,

I second you on that. Mold breaks down things, and as much as the filter will do me good, the bio-filter which is partially compromised of the mold will help keep the tank clean as well.