Hair Algae Starting
I have a bit of hair algae appearing on the tops of my tallest plants leaves. I am wondering if anyone could help me identify why this is happening and how to remove/prevent it. Here are some details of my tank:
The tank is a Biube, i.e. cyclinder of 33cm diameter and 57cm tall, 35 litres volume (9 US gallons), surface area is 855 cm sq. It has an Eden 501 external filter with bio sponge, ceramic noodles and ammo chips. Substrate is flourite and aquagrit mixed. Lighting is 11w arcadia arc-pod. CO2 from one nutrafin natural plant system into filter return. Ferts are Seachem liquids, Flourish, Iron, Trace, Excel, Nitrogen, Phosphorous, Potassium according to Seachem schedule. I do a 20% water change weekly.
Fish: I have 5 cardinal tetra, 2 otocinclus and 2 sterbai corys.
Plants: Amazon swords, cabomba, micro swords, pogostemon helferi, utricularia graminifolia.
Stats are pH 6.7 KH 5.0 (CO2 c. 30ppm), NH4 0ppm, NO2 0ppm, NO3 c. 5ppm, temp is 26 deg C.
I am wondering what I can do to provide good conditions for my plants without encouraging this algae growth, too much / too little light, too much / too little CO2, too much / too little fertilisation?
My otos won't touch the hair algae, are there any small shrimp that will?
Any help hugely appreciated.