Hey Steve and Doug,
Reduced water flow does lead to increased algae gowth. Things like algae spores and detritus settle out and take hold in low flow areas.Numerous books on algae control list one of the methods for controlling algae is increased water movement. Haven't you noticed areas where there is low flow, usually algae growth occurs when nutrient level increases. As far as adding cleaning crew, or herbivore fish you will definately decrease your overall deversity fom your rock. Curing with lights off may cause your corraline to bleach, but it will come back quickly when you add lights. I've cured two tanks this way, and have never had algae blooms occur on my rock from cycling.
Mike
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