Brown diatom algae seems to attack most newly setup tanks, but over time it goes away. I think Amano shrimp eat them too.
Newly setup tanks seem to take a few weeks to "settle down" before minor algae problems ease up. There is probably a good reason for that, but I don't know what it is. My last new setup "turned the corner" when I started using DIY CO2. That seemed to jump start the plants, giving a very obvious boost in plant growth within a couple of days. And, healthy, growing plants are always going to have less algae problems than slow growing, struggling plants.