How long can guppies live in a bag

Some say that fish can last 9 or 10 hours in a bag (or even a day or two in some cases). However, it’s best for you and your fish if you stick to leaving your fish in the bag for 5 to 7 hours. A lot of fish can stay alive without oxygen for 2 days in shallow water. (source)
Fish must not spend much time inside a ziplock bag because the seal may collapse at any time, causing a depletion in oxygen. Ziplock bags are also notorious for leaking, exposing fish to serious danger. In addition to air leakages, the zipper may fail and that could further deplete the oxygen left inside. (source)
Well-packaged fish can survive 2-3 days in a bag without any problems. The water may be cold and a bit filthy, but the metabolism of the fish has slowed down because conditions in the bag have worsened gradually and they have adapted. Jan 30, 2016 (source)
With Kordon Breathing Bags fish have been sealed into bags and sent on long transfer trips that have lasted for 7 to 10 days with no re-bagging and no addition of oxygen. The fish shipments have repeatedly arrived at their destination with very low losses and healthy, non-stressed fish. (source)
I would recommend floating your fish’s bag in the aquarium water for at least 15-30 minutes. This way, your fish will have enough time to acclimate to the water temperature of the tank. (source)
24 to 48 hours The sealed double bag of fish is then placed in a box, woven grass bag or other container for added protection and loaded onto a vehicle for transport. If properly packaged and insulated from heat, these containers can transport fish for 24 to 48 hours without water exchange. Aug 28, 2006 (source)
https://www.youtube.com/watch?v=SWyi1HEmFfM
Another source of oxygen in the tank is live water plants, as they produce oxygen as a by-product during photosynthesis. So, depending on the aquarium system, your fish can survive more days without oxygen. However, a fish can only stay for two days without oxygen in a typical tank. (source)
Adding the Fish Allow the bag to sit for ten minutes, then open the bag and add a cup of your aquarium’s water to it. Reseal the bag and let it float again for ten minutes. Repeat the previous step until the bag is full. Then, you can use a net to transfer the fish from the bag into the tank. (source)
Properly packaged (and cleaned out) most fish can survive 48 hours no problem if they aren’t in extreme heat or cold. Longer than that they can arrive alive but succumb to lack of food or ammonia burn. It’s a tricky vendor/purchaser situation when this happens. Apr 8, 2021 (source)
One way to transport your fish is to put them in plastic bags. You can get plastic fish bags from a pet store. Fill the bag a third of the way full with water from the aquarium. Then, place one fish into each plastic bag. (source)
https://www.youtube.com/watch?v=XBwH7Asxt9s
A fish live without a filter for a maximum of seven days and a minimum of three days. A filter helps clean the water over and over again, so the toxins in it don’t settle down. Dec 25, 2021 (source)
Breathing into a paper bag is a technique that can help you regulate hyperventilation. It works by putting some of the lost carbon dioxide back into your lungs and body. This helps to balance oxygen flow in your body. (source)