So, last night I got home from my week trip to Vegas and my tank looked off; a lot of corals closed up, and an unusually large amount of algae on the front glass, and some nuisance algae cropping up on the rocks. I checked the salinity, and it's at 1.034!!! I've been slowly lowering it back to normal. What I think happened is my recent dosing of mag was bringing up the salinity way more than I expected. Right before I left I noticed my two serpent stars had crawled out into the open (unusual) and stopped moving (died). Now my urchin hasn't been moving and I think it's dead too. I can only spot one of my hermits, none of my turbo snails nor any nass snails. I'm about to check my levels, but I think the algae is from the dying animals releasing nutrients? I'm prepping a water change now. I'm about to leave on another trip for 2-3 weeks, so I'm thinking I should buy some replacement CuC before I leave. My girlfriend can't do much more than feed/top off in my absence.