Help Identifying Algae/Diatoms???

[jostafew]

Hey everyone, I've been struggling with this nuiscance growth in my system and been following the usual guidelines for algae control; water changes, heavy skimming, being carefull not to over-feed, RO/Di makeup water etc. However, to make things more difficult I can't even identify this stuff to figure out how to deal with it!

Please check it out and let me know if you've seen it before. Thanks in advance!