How do you swap your fish to a new tank?

Set up the 30g tank and catch the other fihs in a litte fihs net and set them in the enxt tank if your going to introduce them to a new fihs first let tem get used to there new tank they may freak out a bit at first then when u get ur new fihs leave it in the bag or somethin and set it in the tank. the new f blackmoor can get used to the water temperature and the other fihs will get used to seein it around after about 10min open the bag and let the fihs in with the others. hope this helps