but of course! i think the idea of the first article concluded that water changes can stress the corals because of the sudden change from bad water to suddenly good water. taking bournemans quote above, that in nature its like a 100% water change 3 times a day, the water is never bad in the first place.
so, the theory outlined in the first post would only stand true if you were either cycling your tank or had not done a water change in a long period of time (thus your existing water was bad) then the makeup water you change it with may stress the corals. only the latter should be relevant because hopefully you wouldnt have any corals while cycling anyway
so, i think the point being put across is more relevant if you have excessive nitrates/phosphates etc already in your water. moral of the story is regular and consistant water changes are the best as your existing water will always be close to perfect as you'll get plus this emulates nature as close as possible. thats why my goal at the moment is to make water changes as seamless and as easy as possible - coz i know everyone hates water changes!!!
"some random dude" vs "eric bourneman" - i know who i'd rather believe