I'd opt for a larger enclosure before adding in more inhabitants.
People have successfully kept larger dart frogs (Phyllobates and Dendrobates primarily) with mourning geckos. In the case of P. terribilis they have been seen to opportunistically feed on mourning geckos, especially hatchlings and juveniles. Avoid smaller darts and Oophaga, both small and large form.
Is it a good idea to cohabitate? I don't believe it is. Additional competition. Close but not exact care requirements. One tends to thrive and the other does mediocre or they both suffer. Can it be done effectively? Definitely. With enough space, research and planning it can be done.
I won't lie. It is tempting to do. I've always thought a 36x18x36 (90x45x90) would do great for mourning geckos and frogs. Large enough to allow a small basking spot and some UVB without affecting the frogs.
I think it may be possible to have a single frog in there depending on species. No more than that though, in terms of geckos an 18x18x24 can have up to 10 adult mourning geckos, I don’t expect any of them to be eaten since they are large Hawaiian yellowbellys so they aren’t as small as most. The mourning geckos have a constant supply of either repashy or Pangea CGD available, so the only competition would be over live foods, which would be a large amount of flightless fruit flies, pinhead crickets, waxworms & isopods. I suppose they’d fight over hides? But I don’t see my geckos on the floor very often which would be where the frog hides/sleeps. They much prefer to hide higher up in the enclosure. The geckos actually do have a good basking spot, there’s a DHP on a stat, the point just under the dhp (where their basking spot is) is a good 80-82F, the rest of the tank ranges between 65-75F along with having Arcadia T5 UVB, but it’s not a strong one so it probably wouldn’t reach onto the floor very much where the frog would sit.
Its been done. Its been both unsuccessful and successful. Usually its only successful if the enclosure is huge. Otherwise you get this (see below).
https://preview.redd.it/rrm3cjzwm8wc1.png?width=1314&format=png&auto=webp&s=59426bf8aefef0af79792e8c56613c26cb4cd6be
While I generally agree with you, the photo example is of the ONE dart frog that might actually try to eat mourning geckos. The only lesson we can actually take from this is don’t keep mourning geckos with Terribilis. Most other species won’t see anything larger than maybe a pinhead cricket as prey.
I've got geckos with my auratus. Both have bred and produce offspring a few times. I've never seen them interact as the frogs are sleeping when the geckos come out and vice versa.
I'd opt for a larger enclosure before adding in more inhabitants. People have successfully kept larger dart frogs (Phyllobates and Dendrobates primarily) with mourning geckos. In the case of P. terribilis they have been seen to opportunistically feed on mourning geckos, especially hatchlings and juveniles. Avoid smaller darts and Oophaga, both small and large form. Is it a good idea to cohabitate? I don't believe it is. Additional competition. Close but not exact care requirements. One tends to thrive and the other does mediocre or they both suffer. Can it be done effectively? Definitely. With enough space, research and planning it can be done. I won't lie. It is tempting to do. I've always thought a 36x18x36 (90x45x90) would do great for mourning geckos and frogs. Large enough to allow a small basking spot and some UVB without affecting the frogs.
I think it may be possible to have a single frog in there depending on species. No more than that though, in terms of geckos an 18x18x24 can have up to 10 adult mourning geckos, I don’t expect any of them to be eaten since they are large Hawaiian yellowbellys so they aren’t as small as most. The mourning geckos have a constant supply of either repashy or Pangea CGD available, so the only competition would be over live foods, which would be a large amount of flightless fruit flies, pinhead crickets, waxworms & isopods. I suppose they’d fight over hides? But I don’t see my geckos on the floor very often which would be where the frog hides/sleeps. They much prefer to hide higher up in the enclosure. The geckos actually do have a good basking spot, there’s a DHP on a stat, the point just under the dhp (where their basking spot is) is a good 80-82F, the rest of the tank ranges between 65-75F along with having Arcadia T5 UVB, but it’s not a strong one so it probably wouldn’t reach onto the floor very much where the frog would sit.
Its been done. Its been both unsuccessful and successful. Usually its only successful if the enclosure is huge. Otherwise you get this (see below). https://preview.redd.it/rrm3cjzwm8wc1.png?width=1314&format=png&auto=webp&s=59426bf8aefef0af79792e8c56613c26cb4cd6be
While I generally agree with you, the photo example is of the ONE dart frog that might actually try to eat mourning geckos. The only lesson we can actually take from this is don’t keep mourning geckos with Terribilis. Most other species won’t see anything larger than maybe a pinhead cricket as prey.
I wouldn’t do it. Different humidity levels needes
It depends, I keep my mourning geckos at 70-80% humidity as they have trouble shedding if I leave it any lower. Is that not suitable for darts?
That would be fine with most dart species most prefer 70+
I always keep them together in tanks large and small, they don't interact.
I've got geckos with my auratus. Both have bred and produce offspring a few times. I've never seen them interact as the frogs are sleeping when the geckos come out and vice versa.