I use Coralife sea salt. Why?...because each bucket comes with a free t-shirt! Seriously, When I started a few years back it is what the LFS
recommended. I have been pretty happy with it, although I have noticed varied CA
readings between batches. It buffers Ph very well and keeps CA
around 380. I prefer CA
between 400-420 so I dose from time to time to keep it up. IMHO
, I think the biggest difference among prepared salts is longevity. There may be some salts that allow you to stretch out the time between water changes. However, with frequent and regular water changes I suspect you will not notice a huge difference in salt performance between the various brands.