Dude, it was just a joke about caulerpa, not an assessment of your water quality. It's just that most people don't choose to keep caulerpa in their display tank. That said, I've purposely done it myself in a dedicated macro algae tank. Its tendency to grow out of control aside, I think it's a rather attractive macro algae. It just required a lot of pruning. . .which you'll really want to do on at least a semi-regular basis if you're not already.
Anyway, if I offended you, I apologize. That was not my intent.