Originally Posted by harryggumb
Is there a preferred method between the drip method and the floating bag method?
The 2 methods serve 2 purposes so you should do both.
By floating the bag, you are allowing the temperature of the water in the bag to get to the temperature of the tank. This will go a long way in preventing stress related diseases such as Ick and Oodinium.
Dripping water slowly into the bucket with the fish will help the fish adjust gradually to the differences between what they were in to what they are going in to. Too rapid a change can cause the fish to come down with stress related diseases. (It's important that the air temperature in the room is not very different from the tank temp as this will cause the water in the bucket to change temps during acclimation defeating the purpose of floating the bags and can cause higher stress on the fish when put into the tank.)
So in an ideal world, it's best to do both.