Maggie--
Since I really don't like disturbing froglets to change "paper-towel diapers," I've used a layer of damp cocoanut fiber with some plant cuttings, and most recently a moss substrate--a dried crumbled moss that I picked up at the Arizona Frog Day from a vendor there. It is simply labeled "MOSS Growing substrate." The label also includes "Wholesale Vivarium Supply" and a telephone number: 715-212-7378. I just bought it to put in some sealed critter keepers to bring the frogs I purchased there, back to home in--a four day drive with stop-over's at motels and such, but ended up by keeping them on this until they were ready for the larger tanks. They've done just fine on this without substrate changes, with just a few plant cuttings, no cleaning, just misting and wiping off the plastic. Now I wish I'd paid more attention to the vendor's spiel, because it is really nice stuff. He was ranting about pH, and putting down all other alternatives for a substrate, so I rather tuned him out, as I tend to do when someone attempts to snow me under with dubious data about the particular pH of their product that is exclusively essential to darts, when I've been raising them in a healthy condition for over 6 years on other stuff.
While it's certainly not "the only thing," it is truly nice to raise froglets on. I put about two inches of it in my transport/ quarantine/nurseries with some plant cuttings. I used the rest of it to lace around my vivariums as a top dressing, and some nice short live moss is showing up hither and thither. Among the chopped moss are some pieces of charcoal. That's a nice touch.
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Patty
Pahsimeroi, Idaho
4 D. auratus blue
5 D. galactonotus pumpkin orange splash back
7 D. imitator
6 D. leucomelas
4 D. pumilio Bastimentos
4 D. fantasticus
6 P. terribilis mint and organe
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus
2 P. lugubris