I think most of the parts that come in to contact with the h20 are 99% aluminum. It's the other 1% that could be mercury, lead, uranium who knows? I would just get a 2 outlet fish pump and a couple of air stones heavy enough to sink in how ever many buckets of water you use in the day. Get the water bubbling about 24 hrs before you are going to use it. The ph will rise some but not out of hand. And if your ppms are too high or you have lots of iron or sulfur you might have to get a RO set up.