I've had that discussion with Brett too. Though I still don't risk it ... maybe I should one day given your tests.Yeah, I have used tap water for about 12 months now, on this tank and previous. I did have a phos issue once but as I test water weekly it never eventuates into anything bad. Testing water and tracking your results is the key to any tank.
I feel sorry for tap water. I feel a lot of people blame it or use it as a scape goat for their issues without testing all parameters. Many reefers have long term success with the use of tap water including myself and shops like bunarong.
It does also depend on location. I am lucky to have clean water from my taps.
It's not all about you, Matt :rolleyeslooks like i started a trend