I bought the frag pack on the 1/2 off sale and only two of the 4 frags came healthy. One was very white but had polyps out and the 4th was very brown and had only one feeder polyp. The only 2hr guarantee is bogus unless you are a pro sps collector. Within a day one of my pieces was covered in algae, the one that came brown, two are still doing great and one is doing good.