This was from a post awhile back
The last fish I got the bag was just the right size that it fit snugly in the opening of the tank so it was in the water for temperature then I clipped it to be able to add water directly in the bag.plah831 said:I just clip the open bag to the top of my tank lid. Then use a little cup to add, like 4 ounces of tank water to it every 15 minutes or so. Some people close the bag back up after adding the water, and let it float.