Don't get it WASTE OF MONEY By David on 5/12/13David wouldn't recommend this product to a friendBought three bags of this. The worst salt I ever tried to use. Mixed up 45 Gal. batch for water change on my 180 reef tank. After mixing for a week it was still so cloudy you couldn't see the bottom of the mixing contanier. Dumped it out, made a fresh batch from another brand. It was clear in a matter of hours. Total waste of money. I have a lot of other TUNZE products, mainly pumps, they work great. DON'T EVER WASTE YOUR MONEY ON THIS SALT!