I prefer the method of taking a large plastic bag or even a garbage bag but clear is better. Dipping it into the aquarium and filling it fully with water. This way you can get it float near the surface, try and open the front as fully as possible, get your fish to use your hand to herd the fish to the edges of the aquarium until you get it to go in to the bag. be ready to immediately close down the front of the bag. The you can squeeze out the excess water so you can lift it out the aquarium. Be careful to not leave a big enough gap while squeezing out for fish to jump. This is best done before you do anything to disturb the aquarium sothe fish are not agitated. This method may take some practice but avoids fish thrashing themselves in the net.