I know many of you use filtered water for your misting systems, and I am looking to do the same. Do you have reverse osmosis filters, or just buy filtered water? I looked into some filters, and they range from $250 on up, and Id like to avoide having to replace my nozzle repeatedly. Or, does anyone use the cheaper types like those available for drinking water? Any help would be appreciated before potentially spending the money on a filter. I searched and could only find that people used filtered water, but not much on the systems. Thanks