If you ask 10 people your going to get 9 different opinions. Some mix some use higher end. FIrst you have to figure out what you want to keep/are keeping research what the best parameters are for that type of tank, then figure out which salts or combinations there of give you the best results. I like the results of Aqua Vitro salinity on an SPS tank, I just dont like the way it mixes. I am starting the new system with Oceanic since it has pretty good parameters and mixes pretty clear.