I have this algae growing on my dry rock. Already been through diatoms coming and going away on their own. Tank has been setup for 2.5 months and levels have fluctuated a bit but nitrates have been stable between 2-5. My phosphate has been between 0-0.03. I run my light around 30-40% capacity during peak hours and consists of mainly blues to prevent more algae from whites. Only clownfish and cuc in the tank and waiting for coral. Should I let the algae continue to grow or should I shut off light and scrub rock?