A. Make sure to put fish bags into dark bags or a closed box for the ride home. If it's over an hour, use an insulated box or cooler. Keeping the fish in the dark for the ride home will help keep him calm and keep the ammonia buildup down a bit.
If it's over an hour to the house, ask the store to put the fish into a larger bag.
When they are bagging the fish make sure there is only a third water and two thirds air in the bag. Like this
http://youtu.be/SWyi1HEmFfM. Do not let the store clerk put too much water into the bag. If you're buying several fish ,split them into multiple bags, esp if it's a long trip home.
With tiny fish like otos or neons, I always get them into their main bag and then to keep them out of corners, and keep them from getting squished during transport, I will gently turn that main bag over and slide it top down into a second bag. This is a very important step... as this keeps tiny fish from getting trapped in corners !!The second bag will also help insulate on a longer car ride and keep the temperature more constant.
Flipping the main bag and eliminating corners will also prevent the bags from being popped by spiny fish such as Coreys putting their head in the corner and spreading their pectoral fins and popping your main bag.
An alternate method is to fold up the corners on the bag and tape them into a rounded shape on the bottom, some stores do this instead.
If you are going to float your bags in your tanks , then first take some water OUT of your aquarium , so your tank doesn't overflow. keep this water. You can use it as the 1st cup of water to go into the bags. With small fish and small transport bags don't add a full cup of aquarium water, adjust accordingly, add maybe a quarter of a cup of water.
Turn off your aquarium lights also before you start floating your bags. Dim the room lights as well if possible. The darkened environment will keep the fish in the bag calmer, and also slow buildup of ammonia.
Cories can self poison in the bag. Bring home a bag of tank water from your store without any fish. If you see yellow water or bubbles in the Cory bag, move them into a container of clean tank water. Google this topic for more information.
Turn off your filter if needed, if bags are being moved around too much.
http://youtu.be/g37aRaXNJjU
Drip method.
http://youtu.be/cv9xDdGPYeo
Never pour fish into a net over the sink or something they can fall down into I always pour over a bowl or bucket if I need to use this method.
When the fish have been in the bag on the ride home they are building up toxins in the bag. That is one of the main reasons you don't want that bag of water in your tank. Disease risk and added Ammonia.
Using the quarantine tank is ideal !!, but I know most newbies on this site do not use one unless they are doing salt water.
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