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					Originally Posted by adam84  Looking for someone with experience with these two acros, my diablo is slowly turning yellow with red polyps is this from too high of lighting, having a similar situation with the rainbow loom, it is a solid yellowish green, just curious if this is a light intensity issue. | 
	
 i guess it's possible that a lighting issue could be causing your color issues but in my experience the secret keeping acropora colored up is finding a nutrient & lighting balance. 
to get the nitrate levels i want i test water often and dose potassium nitrate. my phosphate thus far has been easily controlled by my feeding schedule via auto feeder.