try looking up ochtodes secundiramea or wrightiella blodgettii... I have battled the first algea and won it was a long battle. I basicly just hand picked it off make sure not to allow the little peices to get back into the aquarium because it will spread... and for the problem spots i fryed them with a small blow torch (very effective for killing algea if you can remove the rock from the tank)
kris
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