Hey guys I'm wanting to start my biggest tank project yet sometime in the Spring. That being said I'm planning all the minor details now before I start. I see a lot of back and forth on which Red Sea salt mix is best. One of the complaints I hear about the pro is that it leaves a residue in mixing containers. I'm unsure if this is an issue or not. What is this residue anyway? Other than that it seems that the Pro has much higher levels of Ca, dKH, and Mg. I'll admit I don't have much experience with SPS at this time and normally stick to LPS and softies, but I want the option open for SPS later in the tank's life. The problem with the mixed reef seems to be finding parameters that are as close to ideal as possible for a wide range of corals that need different lighting and flow patterns to keep them healthy. Any advice on which salt I should go with? What's your experience been?