I'd like to add one thing. Hair algae is usually a symptom of other prroblems, especially excess nutrients, overfeeding, or in sufficient nutrient removal as was stated several times previously. I have had tremendous luck with the reef janitors from GARF. The recommend a much higher amount of loading than you have done. I think their recommendati0ons may be a little high for long term use, but from experience I can tell you that they will clean up a major outbreak in a very short period of time. GARF primarily recomends mexican dwarf hermits, cerith and nerites snails for hair algae control. Several companies are now selling similar cleanup crews similar to this. If nothing else, check out their website for some good info on hair algae control.

Gary