Lets see, 2 cubes of mysis soaked with selcon will last me two feedings for all my dendro (5 large ones, 5+ medium/small ones), 2 sun coral heads, 5 black sun coral heads, 1 waratah anemone, 4-5 heads of micro balanos, and 4 heads of some branching tubastrea.
I've got a good amount of non photosynthetics in my 14 nano and 2 cubes of mysis can last me two feedings. You might be giving yours too much....if you feed them at night, look at the tank and see if there is any food floating around or any food on the sandbed. The presence of food will let you know that they are spitting some of it out.
If I were you, I'd be very careful about nitrates since you are feeding everyday! Do frequent frequent small water changes and set up a hang on back refugium.
Mike