As some know, I house many of my pacman frogs on foam and have been for at least 2 - 3 months I think. I purchased "air filter" foam from Grainger, 1/4 inch foam, due to a post saying someone used it for fish. I use 3 layers of foam with about 1/4 inch of water (or less) in the bottom of their tub container.

However, it is lightweight and fairly easily moved -- some of my frogs like to get under one or more layers of foam, and if they "burrow" to the bottom that defeats the purpose of the foam keeping them out of their waste/urine in the water. The bigger frogs are starting to tear small holes in it in their attempts to burrow. Furthermore, more searching on the internet leads to the possibility it may not be safe and could have mold inhibitor and/or fire retardent in it (not necessarily Grainger foam, just foam in general that is not made for ponds/fish).

In my attempt to find another solution, I have tried a few other things:

1) Pond filter foam, about 1 in thick, comes in a package of 2 and roughly 1 foot square (a bit rectangular). Cons: expensive, and doesn't seem to "drain" as well as the Grainger foam. Plus it can be hard to really clean well. Pros: fish safe, sturdy.

2) The lime green filter media from Drs Foster and Smith (someone posted a link on this recently). But as was mentioned, seems to be fairly rough for frog use. Currently being tried in two containers, covered with one layer of Grainger foam, but this all uses vertical space and space is limited in the tubs I use. The thing I do like about this arrangement is that the Grainger foam is more stable with a rough surface beneath it -- I'm thinking they can't move that foam now. They can not move the green filter media as it is stiff. I am thinking the green filter media, due to it being stiff, is going to be hard to clean well.

3) Light green pond filter media from another internet source. Looks similar to #2, haven't used it yet.

4) The "blue" stuff (blue on one side, white on the other, fish filter media). Softer then #1 or #2, and a bit thinner (about 3/4" thick). But flimsy and easily moved by the frogs and they can also tear holes in it.

I have also looked at Poret pond/fish filter foam -- looks good, sounds like it may be a good possibility, but is expensive. Could have similar cons to #1, though.

Any comments, suggestions, etc would be greatly appreciated.