ESV,- formerly used Tropic Marin Pro.
I started using ESV after reading Jake Adams articles about it
here and
here. Incidentally I ran into him at MACNA and asked if he was still using it or if his opinion on the salt had changed. His response, if I recall correctly was something to the effect that he still liked it but wasn't using it because of it being hard to source in his local.
I've switched all my maintenance clients over to it as well. It seemed to me that I was getting little diatom blooms from time to time which coincided with TM water changes and I believe I recall reading about others posting about similar results.
Mixes fast
Mixes clear
Apparently less stressful on corals with WC
Cons
Pricey
I repeatedly attempted to contact the company via phone and e-mail with some questions I had at one time and NEVER received a response. Perhaps there was a logical explanation but from my perspective it is unacceptable in my opinion. Doesn't change the fact that the salt mix is a quality product.
Over time one ends up with 9 gillion sets of the included, and in my opinion, uneeded plastic measuring scoops