Tanks a mess

[Azilla]

Hey guys i went away for work out of town a few weeks back came home to my tank Covered in Brown ALge i mean the rocks where Fuzzy. I took out my hard corals and put them into a container to clean the tank. I woke up the next morning to find a god awfull smell i went and looked at my corals. there was a Skin of slime on the top i then worried dumped out all the water to find all my corals Bone white!! $1000 GOne. Now that made me real upset. I have very few corals left in my tank as well as my fish.

So what should i do now that Alge is outa control should i take out allthe rock and Scrub it??? clean the tank clean then remove all the water from the sump and do a full sump water change? Im real lost and getting real upset from haveing a super nice tank to a crap dirty tank...........