RO is a great idea and there are quite a few units on the market to choose from. However there is an issue with return on investment at the hobby level. It will cost $200 by the time you get it home and installed. At $.69/gallon (what it costs to buy distilled water at the local supermarket), that’s about 300 gallons you’ll have to produce maintenance-free before you break even on the RO investment. Then there’s replacement filters and membrane, and knowing when these need replacing. You can buy a test kit to determine this. You don’t want to find out the hard way. Also, depending on your particular water conditions, you might have to derate the RO output by as much as 2:1. On the other hand, there’s the convenience of producing your own water. I’ve chosen the simple route. I go out and buy 12 gallons every 2 weeks of distilled water in bottles, then recycle the containers. I use the room under the sink for storage.--Ken
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