I currently have some black beard algae on one of my fake silk plants. It has not appeared anywhere else. This tank is also not planted. My water parameters are 0 ammonia and nitrite and never more than 10 nitrate. Light is a regular t8 and is on from 3pm-9pm. From some research, BBA is caused due to a CO2 imbalance. Since this is not a planted tank, could that still be the case for me? What else would cause it to grow?