Larry, while I will agree with you that using well water can work, I also think your being a bit irresponsible suggesting it as a _general practice. What are your out of the ground parameters? Well water is notoriously inconsistent from area to area. Well water can also be inconsistent throughout the year from the same well. The average reefer should be using ro/di.

Your buddy that crashed his tank twice, are you suggesting that ro/di water contributed to said crash? IMO, short of a power failure, two crashes just shows me the reefer in question is either negligent, ignorant or foolish.