I have herd people say to rinse live sand and others say not to. I am about to start up my BC 29 and I am not planing to rinse the sand. Is this a mistake? If so why?
You don't have to. It'll just have more detritus and take longer to clear up. I never rinse mine.
I would just run some poly pad to catch the detritus and switch it out as it gets dirty. I always had tanks that had filter socks which caught all the "dust".