I've already done this once and thinking to switch again. I started my build with Kent Salt (cos it was cheap for cycling) and switched to RSCP (using for over 6-7 months now). I really have no big complains other thank Alk spikes for large water changes. I've had to do some 35% PWCs and had a hard time keeping levels in check! I was planning to bring my tank params up to RSCP's levels but wanted to get the right salt mix before I did that. Do all of you keep your tank levels same as your salt mix levels? if no, won't levels mess up? I've read too many posts on good salts and every salt has mixed reviews! RSCP is expensive compared to IO-RC which I hear most reefers have success with. If you're a RC user, pls share your opinion. Now if I were to switch to RC, here's my big concern. RSCP can't be mixed for more than 4 hrs, every other salt suggests 12-24hr mix before adding to tank. If I have to gradually mix both salts in different ratios to not shock my system, how would I handle the mixing times issue?