I too feed every other day, with the exception of Nori almost every day for my tangs. Feeding is far more complex then dumping food in the tank. First off, feed high quality foods so you can feed less often. Secondly, prepare your food properly. If you are feeding any frozen food it should be thawed and rinsed in RO
water before adding it to the tank. The "juice" produced when thawing can foul your tank very fast. Lastly, and equally important, add some good dietary supppliments to your food and let it soak prior to feeding. I like Selcon, Vita-chem and Garlic Extreme.
Here is what I do...I feed every other day, rotaitng flake and frozen. For flake I use Ocean Nutrition Prime Reef and OSO Spirulina. For the frozen I use San Fransisco Bay Mysis or Krill, add DT's Phytoplankton, Kent ZooMax and Liquid Life Marine Plankton. Soak in Selcon, vita chem annd garlic extreme. Sounds complicated but it is easy. As I said I hang nori almost every day as well.
Feed lightly and turn off any filtration during the feeding process (except powerheads). This will keep the food circulating in the tank while preventing food from being sucked up to rot in the filters or skimmers. HTH