Dr Foster & Smith started carrying reef supplements. I decided to give the a try. DFS customer service is always great and the package arrived quickly. The packaging design is a resealable, air tight, plastic bucket. It is big enough to let you scoop out the desired amount with measuring cups. The calcium chloride gain size is comparable to a pebble and because of that it takes a little longer to dissolve in the water. I have been using the new DFS product for a little over a month now with no visible difference in tank health