I have an indoor fountain that is made of copper. I would like to inhibit bateria and algae growth in the water, but don’t want to corrode the copper (or the ABS pump or PVC fittings). Does anyone have any suggestions?

People who know birds generally know that they love the sound of running water – it attracts them and makes them sing. I’d like to build a simple, pole-mounted bird-bath / water fountain for my birds outdoors. I’m trying to locate a pump for the water – preferably solar powered. Inexpensive, reliable, no issues with priming, enough of a flow to make a little sound.
1. What kind of pump is best?
2. What’s a good vendor for this pump?
3. Is it realistic to power it with solar? Source / type of solar celll?