My tank is being slowly taken over by a red bubble-like algae that looks something like sea grapes (Botryocladia) but this looks a little different than the pics I see on the net.  Can anyone identify this?  Any ideas how to control it.  If I take rocks out and scrub they are quickly covered with a lubricant-like slime which takes some doing to get off once the bubbles have burst.
The pictures are huge, I won't put them up here.  TIA.
http://members.shaw.ca/scottndebi/Algae2.JPG
http://members.shaw.ca/scottndebi/_borders/Algae1.JPG