<a href=showthread.php?s=&postid=13019184#post13019184 target=_blank>Originally posted</a> by serpentman
Macro is a complex algae (as apposed to diatom, etc) that is used to export nutrients and out compete less desirable nuisance algaes. Common species in aquaria are caulerpa and chaetomorpha. Growing is easy. All you have to do is dedicate an area to grow it such as a refugium or dedicated section of your sump. Macro grows well under a standard 6500K daylight compact flourescent bulb from Home Depot, etc.
You might want to google Refugiums to see more on how to set up.