ESV salt mix

I just started using this mix a month or so ago on my 30 sps cube, and have to say I really like this salt. After reading  about it through Reef Builders and then again seeing it used first hand and talking to Cherry Corals at spring fest I decided i would give it a try. You basically have 2 dry and 2 liquid parts to mix. From start to finish I can mix and do a water change in 30 min or less as long as my temp is ok. This is great if you've ever been in a pinch/emergency to do a water change with none made-up. Also, when adding the new water, none of my corals closed up or acted any different after the water change. My mixing pump/bucket are clean, no signs of precipitation of calcium- brown flim ect at all. After using roughly 50 gallons of this mix and seeing positive reviews from others, I may just have found a new salt mix. I guess only time will tell.
http://reefbuilders.com/2010/01/14/b-ionic-seawater-system-is-a-microbatch-salt-mix-that-is-perfect-for-nano-reefers-large-tanks-too/

 

No residue after 24 hr mix. I thought that also and let it sit for a day. I picked it up at Marine Depot, no heavy shipping fee either for some reason??
http://reefbuilders.com/2010/03/22/bionic-seawater-mixing-pump-clean-immaculate/