Hey minireef,
Algae outbreaks are typical of new tanks, when water parameters and flow are not yet stabilized and controlled. Even older tanks may get a small outbreak of two when there is death.
Key thing is that it should go away IF you continue to keep water parameters down (make sure your test kits are done properly) esp nitrates and phosphates, ensure enough flow. One way to stop micro-algae would be to use a UV sterilizer, but it is not recommended for new tanks like yours.
Algae-eaters would also help, eg turbos, sea hare, lawnmover, etc. Patience, and lots of care.