I float the bag in the tank for 15 to 30 minutes. I usually don't turn off the lights first. Then I just add a little bit of tank water to the bag using a turkey baster, every five minutes or so, for another 30 minutes. Then I catch the fish with a net and move it into the tank. I used to not be so careful about using a net; I used to just "push" the fish in, but then I found out that my LFS uses copper in all their fish tanks. So, unbeknownst to me, I had slowly been adding copper to my tank every time a bag accidentally slipped under water (which happened a lot), and every time I moved the fish from the bag to the tank. BTW, I just found this out a couple weeks ago. So I have some amount of copper in my new 240. But not enough to register on a test...