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Hard-Rock
01/30/2007, 06:50 PM
My sand will get a a brown coloring to it about every 2 days .Can some one tell me what it is ,and how I can fix the problem so my sand will be nice and clean all the time .I have a 75 gallon with a small refuge ,and a super skimmer .

http://www.dropshots.com/photos/237827/20070130/212959.jpg

http://www.dropshots.com/photos/237827/20070130/212946.jpg

alan214
01/30/2007, 07:11 PM
My first guess would be a diatom outbreak due to a high nutrient load.