I just read this article, and would recommend it to the new folks or to keep it as quick reference for chemical levels.

Would have rathered that the chemicals, and subsequent control measures, be stacked in order of chronological concern. ie, Ammonia, nitrite, nitrate, phosphate, calcium, ectera.
Perhaps not in that particular order. I read it primarily for its calcium measures, and was surprised to see ammonia after the iodine paragraphs.

Anyway, I enjoyed the article.

http://reefkeeping.com/issues/2004-05/rhf/index.php