This months reefkeeping edition podcast is an interview with Sarah Lardizabal. In this show she gives us a great introduction to macroalgae.
Here are some of the topics discussed

Differences between plants and algae
Differences between macro and micro algae
Difference between beneficial and nuisance macroalgae
Tips to identify Macro algae
Explanation of macroalgae sexual reproduction
Beneficial uses of macro algae