Electrical devices are also used for agitation. Pouring old water back into the transport container. Aerating a container by hand. Pumping air into the transport water can be done continuously from the start of travel or as an emergency measure. The finest air bubbles possible should be pumped into the water.
Oxygen diffuses faster through fine bubbles.
Large bubbles forcefully pumped into the water may also injure fish. Equipment which can be used includes bicycle tire pumps, battery operated aerators from aquarium shops, air filled inner tubes with air being squeezed through a regulated nozzle and any other locally built device. Pumping air into a transport container. Agitation can be done simultaneously with aeration. However, these are only temporary measures and will not keep the fish alive very long.