I have 3. A small net used for the real little guys or to scope debrie from the tank, a large string net used to chase the fish into and a medium sized one that chases the fish and even gets lucky and catches one every now and then. My tilapia are not only fast but seem to be prolific jumpers. It's a good thing my growled is on top of the tank or they would jump right out as I try to catch them. Finally got 3 separated out to my breeding tank. Waiting for the action to start.