1 Month later

It's only a small diatom bloom it won't hurt anything. You can clean it off it won't cause you any issues at all. The diatom bloom will fade as the free silica in your tank is used up.
Are you planning on getting more live rock? In a berlin style tank like yours that's pretty much all you have to filter your water. It will be a lot easier for you to keep up with 2lbs to 2.5 lbs per gallon with that style of set up.
HTH
Chris

Max is right about the LR amounts. I have almost 100lbs total in my 36 gal /20gal sump system along with a good crop of caulerpa. I've finally reached my ultimate goal of 0 amonia and 0 nitrate This is with a prettty big cleaning crew, 4 fish, 2 big anemones and bunch of soft corals. I wish I had this knowledge 25 years ago

Alvarado, honestly it will depend on how light and porus your rock is. If you get heavy dense rock like from tampa bay go for 2.5 . If you get something light like Brazil or most of the Fiji rock go for about 2. this is a little more than is normal in a tank with a deep sand bed but, you'll need the extra surface space for bacterial infestation,"it's a good thing."
Also this probably doesn't need to be said but, if you are running a canister or any other filter that has media in it run it empty. In this sort of set up if you don't stay on top of issues they will get out of hand pretty fast. Berlin systems do have some advantages over tanks with deep sand beds but there are some disadvantages as well.
hth
chris