There's like 9 or so different kinds of macro in there. Some came as hitchhikers (a red branchy macro, and a green razorish looking macro- not razor caulerpa, but reminescent) and some I bought on purpose because I thought they were pretty (halimeda,codium fragile, sea lettuce, 2 kinds of caulerpa). It helps me be able to overfeed when I feel like it, or when the kids get to feed the tank. Amazing how it grows. My tang and my lawnmower blenny are both so fat it's kind of embarassing, but they are good guys that try hard... I also think having so much macro inhibits the cyano/valonia/hair algaes a bit through competition.
<grin>
Laurie