If you keep an eye on your aquarium carefully, you will notice abnormalities quickly. If, for example, a fish is sick, you should take it out of the aquarium and put it into a quarantine tank to treat the fish and avoid infection. In order to transfer fast fish stress free you should use a net for the aquarium. You can not only catch fish, prawns and other inhabitants of the aquarium with a suitable net: you can also remove leftover feed flakes, loosened plant parts or smaller decorative objects from the water with the net without having to reach into the tank with your hand.