After doing the math, it came out to 3/8 of a cup per gallon..and after aerating the ro/di water over night, about 12 hours, i slowly mixed in the salt, using a mag 5, which is my mixing pump for an additional 2 hours, which i would have to say the rscp really disolved quickly, after the 2 hours, checking with a hydro, and a refracto came up with a sg of 1.023 with ph of 8.4, within a few hours i could really see a big improvement in a lot of my corals, especially my Duncans in color and extension. all in all seems to be good so far, will keep an update over the next couple weeks..