My D. pumilio bastimentos pairs are quite bold and conspicuous most of the time, and each utilizes 33 gallon tall hex tanks from top to bottom. They often feed on the floor, breed in the bromes, and are virtually all over the place. They don't show any shyness when I'm around or meddling with the tank, and the males will often call when I'm right in their faces. I've been able to watch their breeding activity, which is on an open leaf without disrupting them. They have not successfully raised any tads yet, although one did morph out, but had SLS. (Spindly leg syndrome.) Patrick (Saurian) told me that it is relatively common with first clutches of these pumlios, but later clutches seem to do well. I've posted a picture of it. You can see that it is lying flat and has no front legs. I'm not sure if the females are as aggressive and territorial as the males, but I suspect they might be. I've just never observed them all together except as froglets and young juveniles.
If you like the leucs, they might be the way to go with a large group. They also use all layers, hunt on the ground, splash around in the waterways and you could probably keep up to 10 in a 125. I have 6 in a heavily planted 80 gallon bow with lots of bromeliads and a stream/pond. While they have called a lot, they have never bred--at least I've never found any eggs, but since I'm not into deliberately breeding, I've never bothered "conditioning" them as is sometimes recommended, with a relatively dry spell followed by heavy misting. I've seen a little half-hearted wrestling between a couple of the fat females, but I've never noticed any vicious aggression. They are also relatively cheap, so a large group would be more affordable. The pumilios are much more expensive, so any losses from experimenting would be even more devastating than usual.
Another very nice frog that also does well in groups (and even breeds better in groups) is the orange glactonotus. I have the orange splash backs. They are bold and actually "intelligent," if this quality can be applied to a frog. They are super-fun to watch. Mine are about 7 years old now. They are also on the expensive side however, but less likely to present a problem than a group of pumilios in a single tank.


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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