As the heavier frogs get older, they are less able to climb glass, so always keep an easy egress for them in case they fall in. They can swim, by the way.
If you have a pair, you probably don't have to worry about fighting and drowning each other, which occurs in more shallow, rock filled ponds betweem females, where the fighters can get a purchase on rocks to drown each other, but have to separarate and swim for shore to save themselves in the deeper pond. Like Josh, I've never seen this happen with tincs or their close relatives first hand, but we sure read a lot about female tincs in particular, holding each other and drowing in shallow waterways on various other forums. There may be something to this, or maybe not. I once found one of my galactonotus trying to climb the front glass after he had apparently fallen in the aquarium portion and didn't get to the log egress. As a full adult, he was merely hanging on, so I helped him back into the vivarium portion. He probably could have figured it out after awhile, but at the time, it seemed he was getting pretty tired and not making much progress in figuring out where he was. How many times this may have happened when I wasn't around or didn't notice, I have no idea. In any event, I still have the same original frogs.
Be sure to keep your pond screened off well from the rest of the false bottom, if this is your type of set-up. They can possibly get trapped under the substrate in the false bottom if the pond isn't separated from it by a screen or some other water permeable barrier arrangement.
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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