Algae ID & help

[maron6977]

Tank is approx 6-7 months old . I have a few urchins and snails . This algae started approx 3-4 weeks ago and slowly getting worse .
Water did slip a little NO3 10ppm , NO4 .09
Also the feed line from cal reactor slowed down so Alk, Cal & Mag started to drop off . Trying to ramp everything back up .
I think ID would help me to remedy & hoping increasing mag would kill it off.
http://i24.photobucket.com/albums/c49/maron6977/F94FDFE2-B767-42E3-A97A-FC417DA97E6D_zpsftgy6hlk.jpg (http://s24.photobucket.com/user/maron6977/media/F94FDFE2-B767-42E3-A97A-FC417DA97E6D_zpsftgy6hlk.jpg.html)
http://i24.photobucket.com/albums/c49/maron6977/BAACB26B-F263-470F-9509-835721D783E4_zps4zbaudrm.jpg (http://s24.photobucket.com/user/maron6977/media/BAACB26B-F263-470F-9509-835721D783E4_zps4zbaudrm.jpg.html)
http://i24.photobucket.com/albums/c49/maron6977/6012AA27-CC6F-441B-89E9-FFC8A34500CD_zpska4s2dgc.jpg (http://s24.photobucket.com/user/maron6977/media/6012AA27-CC6F-441B-89E9-FFC8A34500CD_zpska4s2dgc.jpg.html)
http://i24.photobucket.com/albums/c49/maron6977/61EF1471-FFD5-4A73-84A4-16CC042DF8A2_zpsfxvhxcuy.jpg (http://s24.photobucket.com/user/maron6977/media/61EF1471-FFD5-4A73-84A4-16CC042DF8A2_zpsfxvhxcuy.jpg.html)