A little background.. I have a 300+ gallon system. Up and running 4 years and has been thriving. Recently I had picked up some montis... went through my normal process of dipping, holding tank then into the system. No visible pests when I dipped. Low and behold first hit was my tropic thunder. Decimated. Pulled it out and had nudis all over the base. Next to go was a 10" setosa that in no way could be pulled out. Decimated. Fast forward lost most of my high end Montis. A few ordinary ones are doing fine. My nudis have great taste! I picked up some yellow coris. They seem to be working hard during the day... but the freaks come out at night! So here I go. Day 1. Aug 31st 8:15pm. Dosed 30 ounces of Purge. Skimmer off, no charcoal and UV off. More to come.