You say you feed twice a day? What's your livestock? Also those foods do leave a lot of trace matter in the water column. 90% of my food is flake and I feed once a day for two days then go one day without feeding. And I feed black jack reef crack once a week. (It's a locally made frozen mix). And I have 5 medium size tangs, fox face, clowns, wrasse, goby, anthias and chromies. A lot of people will probably bash flake because of PO4. Been feeding this way for years and none of my tanks have had a single trace of nitrates or phosphates. I've got a thread here in the SPS forum that has pictures and video of my tank. Just search my name to find. I'd post a link but I'm on my phone and sucks copying and pasting. The only thing I dose is calcium (ice melt), alk (baking soda), and mag (Epson salts). No other additives and I use just regular Instant Ocean salt. And I don't run any filter socks. Just a refuge with chaeto, live rock and a skimmer. So u don't need to be fancy to get great results. And FYI your drags look fine. Just keep an eye on them and I would watch the feeding. It sounds kinda heavy to me.