Review on U P Aqua D 550 Shrimp Sand by Jason Unruh

Do not buy this substrate under any circumstances. it will never stop seeping gunpowder into your tank. I had to restart my aquarium and remove this sand. No matter how long you keep it underwater, it will never stop turning the water black. I thought I'd just put it on, it can't be that bad. Eventually some settled and the water cleared up a bit, but the black powder just covered everything in the tank. I had to throw it away. total waste of money.