Ever since upgrading from 55 to 75 and also upgrading my lighting to 2x250 MH, I have started to get this white slim/algae material on all of my glass and in my sump. It seems to just grow on the walls of the tank much like algae. It comes right off with a mag scaper. 1026 on the SG, 440 on calcium, 9 DKH on Alk and Mag is 1250. My nitrates have crepe up to about 10 ppm. Temps run 78-81. New sand bed when I switched out the tanks. Mixed reef with light bio load.
http://www.flickr.com/photos/58693669@N00/
http://www.flickr.com/photos/58693669@N00/
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