Just curious, on this new aquarium are you using different bulbs at all? I just set up my aquarium around a month (even less)... I used my freshwater plant grow-lights and mixed some seaweed in the water (took some sea-weed, chopped it into tiny pieces with a blender, and mixed it into some of my aquarium SW
, to 'seed' some algae growth.) I did this because my LR
came with an lawnmower blenny, some snails, and other creatures that need some algae growth. Within around 3-4 days I finally began seeing the same as you. Tiny spurs of green algae hair appearing on my aquarium glass, on my surface skimmer box, and aquarium heater. I then switched my lighting to 10000k and 6000k bulbs, the algae 'bloom' has stopped in its tracks for the past 10 days or so.