Same product as the liquid, but much cheaper By Lindsey on 1/27/2014
Lindsey would recommend this product to a friend
Personally I love the red sea line for a number of reasons I won't get into. The liquids are convenient, but I also like to save my reefing budget for more coral, so the powdered versions are a win for me. They mix to the same concentration as the liquid bottles, but you can make multiple bottles from each jar of powder. For this calcium, 1 powder jar will make 3 and just over 1/2 of the 500 mL bottles. That makes it about 1/3 the price.
One tip: do invest in a decent scale that will weigh in grams if you do not have one, easier and more accurate that way.