I believe that this Holmes-Farley article would be THE roadmap for dealing with low pH situation. This would be required reading for anyone who is questioning what their pH is doing and whether or not it needs attention.
I agree...manipulating pH should be the LAST thing that needs to be controlled and only once one has good control over Salinity, Alkalinity, Calcium, and Temperature.
http://www.reefkeeping.com/issues/2004-09/rhf/index.php
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank:
http://www.canreef.com/vbulletin/showthread.php?t=28436