I had to leave the tank on auto-pilot for 10 days while I was in Boston and everything went OK. I can't believe how much coraline was growing on my front glass after not scraping for 14 days, little 5mm islands of purple all over. Skimer silencer is working great. The new MP40 wetside is a total bust - it's been seizing up and probably needs another vinegar bath, but considering it's only a month old I'm about ready to throw it away in frustration at this point. I have an old used MP40 working great, the new one I buy - nothing but trouble, even with a brand new wetside. I don't have any problems with calcium carbonate precipitation or anything else - the other MP40 is fine and barely needs to be cleaned more than every 3-4 months. In sadder news for my tank but great news for my family, we're going to be moving home to Boston in April. This means I'll be breaking my tank down, so if there are any coral/fish you would like you should get in touch. I'll be putting up a thread later this week, probably.