One thing to note about this pump is that the casing gets quite warm when it's been running for a while. Whether this adds enough heat to the system to compromise performance is something we'll see later. Also, you will need to make sure the reservoir is kept quite full. The pump is powerful enough to create a vortex in the reservoir and if the water level is too low, this vortex will reach down into the pump inlet and bubbles will be pumped through the system.