If you plan on using The Redsea Foundation program I would not suggest mixing. Follow there directions as these products work in conjunction with each other.
"Red Sea Coral Color A" is an Iodine/Halogen supplement, "Two Little Fishies C-Balance Part A" is the calcium half of a two part dosing system. They couldn't be more different.
Are you trying to dose two part, or supplement certain elements for coral coloration?