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meegwell
07/14/2013, 03:03 PM
went on vacation for a week came back to some pale corals and this (the reddish blob, not the aptasia)

http://i1291.photobucket.com/albums/b550/meegwell/DSC00049_zps7f3102c6.jpg

drew2007
07/14/2013, 03:07 PM
Looks like Cyanobacteria. I have a few patches of it on my sand after a 8 month battle with it.

figuerres
07/14/2013, 04:19 PM
Looks like Cyanobacteria. I have a few patches of it on my sand after a 8 month battle with it.

yes, cyano .... sign of excess waste getting processed

meegwell
07/14/2013, 05:18 PM
Makes sense - auto feeder, new food, slow release food...back to normal now. I understand this stuff uses phosphate big time. I havent tested yet, just getting re-acclimated to being home - but could this be why my birdsnest and grape corals are very pale?

tallball158
07/14/2013, 06:57 PM
Is it covering the corals?

meegwell
07/15/2013, 07:12 AM
no that patch is the only one its about 4x4" on the sand bed of a 90g.

Sugar Magnolia
07/15/2013, 07:21 AM
Yes, excess nutrients (poor water quality) can cause some corals health to decline.