Hi H.
Here is a pic of two good choices for Macro algae. Chaetomorpha sp. (green) and Gracilaria sp. (red)
They grow well under CF lighting (screw in spirals and really well under T-5 fluorescents. The advantage with these two types of algae is that they do not revert to a sexual form and spread their spores throughout the tank.
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Aprilia MX125