Which brand of salt are you speaking of?
In a perfect reefing world, sticking with the same salt throughout your time in the hobby is a nice idea. For the most part, this has been the case for me in using Instant Ocean Reef Crystals.
At one point, I did transition over to Red Sea Pro in hopes of seeing more growth. But it was a fiasco, and I ended up transitioning back. What I have found is that blending some Red Sea Pro in with Instant Ocean Reef Crystals has been an effective compromise.
In the end, if it isn't broken, my advice is not to fix it.