Containers that do not have water filters or pumps to circulate water can also increase stress to fish.

A pump circulates liquid through the circuit.

It uses large pumps to circulate water, and each of the two pumps can circulate 88,500 gallons per minute.

The pump circulates the water .

These pumps circulate water through the reactor to remove decay heat.

A pump circulates the fluid, which heats up as it is exposed to the sun.

The pump, which is connected to the reactor by pipes, circulates water to increase the reactor's efficiency.

A pump circulated oxygen through the gas-containing loop.

The pumps had been circulating reaction mass-water-through the plasma thrusters for some minutes with a deep thrumming.

When the gearbox is cold the pump will not circulate thick oil and premature failure of bearings etc. will result.