From Bob Pendrey:

After about 5 months the plastic of the rotor on the replacement pump I fitted became soft. I think it was attacked by the hydrogen peroxide.

I have replaced the pump with the same one again but have stopped using hydrogen peroxide and I am now using waterbed conditioner instead. It is also cheaper than hydrogen peroxide.

The hydrogen peroxide may had also caused the failure of the original Chilli Pump .

So far so good.

I replaced the water pump on a CP-100 Model with an externally mounted 12 volt magnetic drive aquarium pump. Took out the impeller from the Chilli pump and extended the hoses outside the box. Works better than new. The new pump is powered by a 12 volt power pack. Pump doesn’t get hot as I think it is cooled by the water flow. I also cut out the grills on the air outlets. Pump details” Brushless Magnetic Drive Submersible Water Pump 350L/H 4.5M 12W DC12V Bob Pendrey Australia