If you don't already know, the Reef Foundation is basically Part A, B, and C. Reef Colors are in short the trace elements that get used up mainly Iron, Potassium, and Iodine. Reef Energy is the Amino Acids and other components that corals absorb. I don't use reef colors since I do 25-30 gallon water changes on my present tank. Now if my Potassium or Iron is low then I dose to optimal levels.
I love Reef Energy A and B. I usually dose at night when the actnics are on and when Im a little typsy because the glow is pretty cool and freaky. I think I have a video of it going into my tank.
http://youtu.be/smi_WDWBGpk