Diatom Outburst

Yep. Sounds about right. It's pretty normal and will go away with time. New tanks go through this. First everything will be brown.... then you'll have everything turn green and then everything will turn pink and purple.

It's pretty normal and you really should just keep an eye on it and your keep your water parameters in check and it'll run it's course soon.

This isn't my tank but it looks a lot like this:

It sounds like normal cycling of the tank to me. I would beef up the CUC with at least another dozen astrea snails.

From my experience it will cover a lot of the tank and will last a few weeks.

Yes it is normal but it does not have to last more than a few days to a week. That's why I wrote the thread below in my signature line. It's about using living organisms available through other hobbyists to get a tank going sooner with less problem algae and less trouble.

If you would like to get some Chaetomorpha Macroalgae free from someone here on this MB (I have some) and turn on the lights longer, the Chaeto will eat up the pollution that normally happens when starting up a new tank. It works great. I do it this way all the time. In fact, I have done this twice in the last month.

Something is messed up on my screen in the text you wrote below that 2nd pic. Does it say that there is only one snail currently? Like Burt said, more snails are always needed at first. I would add at least a dozen now, and more later if needed. There are three types of snails that work well. Astrea, Margarita and Cerith. I use a variety of all three. If this is not dealt with now, in another two months the tank could have a much worse algae problem than the simple covering of diatoms it has now. Please read the thread found below when you click on Reefkeeping Tips.