1. in my fish tank the brown algea grows
2. the temperature is 26C
3. i leave fish tank lights on 10-12 hours a day
4. the plant species are ''star grass''
5. the lighting which i use for the plants are: juwel day light 45W ( the fish tank is 180Liters juwel rio)
6. the fishes are , zebra danios , white cloud mountain minnows , black neon tetras
my plants are not reef plants , they are fresh water. i think brown algea has something to do with.