I feed every other day w/filtration and skimmer off, just running p/h's for an hour. Feeding a mix of dt phyto, reef chili, reef solutions and marine snow at half the recommended dose. yeah its all pretty much the same stuff but I have had nothing but the best results.
All my own personal coral and the coral i have adopted that had one leg in the grave, had all great success and great rejuvenation rate. With the mix that I make up every body reaches out for food, even my night feeders activate their feeder tentacles.
I do not how ever recommend spot/target feeding sponge, they are like clams you can clog their gills/pores. So for all intensive purposes, if your recommended dose is three caps? I would do one capful too maybe one and a half caps (most capfuls being around 5ml) and this dosing would depend on results.
Also feeding would/should be gauged by co-inhabitants. If you have a lot of filter feeders they dosing maybe higher and if less co-inhabitants less the dose. I found that with my tanks I bought six more feather dusters to add to my collection of wild caught feathers to help capture the food being dosed in the tank. Feather dusters are a great way to control loose food free floating and screwing up water quality, plus adds a nice element to the tank. So I think.