Things You'll Need
- Fish net
Instructions
Place a fish net in the water upside down (with the handle end in the tank). Some puffers have sharp spikes that can get caught in a net so keep the netting out of the water.
Tap the puffer with the handle of the net. It will probably just swim away.
Follow the puffer with the net, continuing to tap it. This will eventually either scare or anger the fish into puffing up. It may not puff up all the way at first so you may need to tap it again.