Thanks for the re-assureance. It'll be the longest I've let the water go, about 3 weeks. Okay, now that's been established I've got another question if anyones paying any attention after that first post. My dilema is that I have 3 new corals to place when I get home: toadstool, bubble and a small zoo rock. Should I acclimate them first (assuming params are okay, which I have never seen a problem except for the first few months) and then perform several small changes. The system has been up for over a year, so I believe it is stable enough for a small lapse in water change. Or should I try to to both at the same time, so that the corals get fresh and "old" water. I am going to use the drip method recommended by SWF. I've always had success with it, the corals seem to open very readily after placement. Any advice would be nice:yes: