How long can African Dwarf Frogs survive out of water?

They cannot survive out of water. Their skin will dry out and they'll die. You could keep then out of the water, and at 100% humidity, they might survive for a while. They can indeed be kept out of the water for a while without negative results, but it's not advisable. A while could be anywhere from a few hours to possibly a couple days. I really wouldn't try a couple days. Of course, I wouldn't try taking them out at all. And they DO rise to the surface to breathe. They don't have to leave the water. Just stick their noses out. It's not very often, because they're cold blooded, not active enough to use oxygen, and because amphibians absorb oxygen through their skin. In addition to drying out outside of the water, their bodies cant support their weight. I know the weight seems negligible, but it's not to them. They suffocate because their organs move around wrong.

African Dwarf Frogs

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1. not very long, 2. you're right, the snail and shrimp probably won't survive the medication for ich. But it's worth a try. 3. all your fish and the tank need to be treated 4. salt alone will probably not do it 5. try to raise the temp to 80-84 and use the salt, maybe it'll work. Whoever lives, great, replace whoever dies later. 6. You can try ridich, at a lower dose probably 3/4 of the recommended dose, but twice a day for about a week plus a few days. Always treat for 3-5 days after the last sign of ich on the fish 7. Water from the tank that you call good won't be any good at all without the filter, heater etc. and the fish will all die within a few days to a week. even a hospital tank that isn't set up 2 months in advance and properly cycled will be useless and kill your fish. 8. gravel vacuuming every few days will help, not only to remove ich eggs from the bottom, but also to keep the water healthier during the medicating to repeat, it's the whole tank you need to treat, ich is not something you treat by removing the fish.

African water frogs are very hardy (with the right conditions) but they do need water to live. I had one get out and found it a couple days later dried up on the stairs. If your worried about them escaping, put a cover over the cage and don't fill the bowl up too far. Only about 3/4s of the way.

Aquatic Frogs

only about 20 to 30 min

It depends on many factors