Brown algae??

[bk.smash]

Came home to this. Buddy from work gave me the corals for free did this maybe come with them? They were put in over a span of a week so it wasn't a full all at once. The tank is about 2 months old and all my nitrates ammonia and nitrite levels measure fine.. or is it just time for a pair of snails?

 

[aznflyfisherman]

Its diatom, pretty much all new tank goes through it. You should add a few hermits n snails n continue with 10 to 15% water change. Add a powerhead for water movement. I think on my tank the diatom went away after 3 to 4 months, somewhere around there, i cant remember.