Great thread! I am having a similar problem just 2 months after start. I am vastly understocked (1 fish only) with tons of macros. Not having corals (yet) helps because I have minimal Mg/Ca consumption, so I can do 8% WC every 2 weeks only (probably more). Red film all over my sand and rocks with my macro suffering. I also come from freshwater and prefer minimalist approach but in the end I decided to start dosing nutrients (micro & macro) and see what happen.. Heavy feeding apparently does not increase much of those if you have a lot of pods.