Can anyone tell me what king of algae this is and some ways to combat it. I'm doing a 30 percent water change 2 times a week and my ammonia and nitrite are 0 with a 10 nitrate reading. Phosphates are between .5 and .25. I am using DIY CO2 with 2 2-liter bottles, i think that I am keeping my co2 around 30 ppm. This is in my tank in my signature.

