Mcgyvr has it right - don't make big moves. It is a new tank, and dinos or cyano are relatively common (from the pic, it is not diatoms) - it usually resolves itself as your biological filter matures. You can try to decrease your photoperiod a bit (if you don't have any corals, which on a month-old tank you likely shouldn't) and increase water flow. Some specs on your tank, filter setup, etc. might help diagnose - but really, just give it another month, keep up on maintenance - be patient. Difficult, I know, on a new tank, but it is key to this journey : )