Ive used Aqua-sd out they were amazing and very fast responses, orders from top shelf aquatics as well and corals anonymous. They were all honestly great all fast responses. Ive ordered from aqua sd more than others though do to there ebay auctions, I end up getting some really good deals every now and then. I always dip in coral rx and 99% of the time never any pest or anything. Once I had a sand sifting star make it through somehow and found him in the tank a while later with no idea how he got in. Im assuming from the corals.