Marc provides some valuable and well thought out advice on the use of reverse osmosis units.

More... (http://www.reefkeeping.com/issues/2007-05/ml/index.php)

Wow! That octopus hitchhiker thread went from wonderous to horrible in no time! I was still surprised he didn't do a 100% water change and see if anything might tough it out.

I thought by that intro sentence the article was about instructing ya how to do it... I was about to say what a sucky idea!