Well after looking at pics on the net I'm not 100% sure its mexicana caulerpa now???
It was given to me as Mexicana but there is another species that looks more like it.
It looks kind of like both in these pics but on othere sites my leaves are much smaller then on the mexicana. On this site it looks like caulerpa sertularoides.
What ever it is it grows fas and keeps NO3
at 0 for years. Just yanked a soft ball size piece out last night and put it in my fuge on the 55.
MT my caulerpa grows under a 20 watt NO fish tank light, thats it. Even my small clumb of cheto is growing some. Its been my experience that macro does not need much light to do well. NO3
reduction is great but PO4
not sure if it reduces that much. If I had to guess I would say there is not much PO4
removal with macro. I have a PB reactor for that.