Your DT looks very young your sys is going thu the GHA ugly phase, yes that algae will get on everything, its best to avoid any corals till the DT stabilizes, go fish first, then soft corals next, then hard corals even later once fully matured... which can take months and even long as a yr sometimes or longer depending on sys. bio load and setup.
It will slowly clear up IF you can get nutrient export higher then nutrient inport.