Join Date: Aug 2006
Location: Jersey City, NJ
i have no explanations but also like to add my own oberservation.
I have a 20 gallon with current freshwater led+ and no co2, 8 hour photo period, heater. etc.. all stable. There is no bba at all.
I added pressurized co2 about 3 weeks later with no change to any other params, co2 turns on 2 hrs before photo period, turns off 15 mins after photo period, my dropchecker is a nice light green, however i noticed bba started appearing all over my rocks and started to cover my hairgrass.
They are easy to remove, i just took a toothbrush and brushed them off and the filter took care of the rest.
But nonetheless, i dont know why this is happening. As my light/heat/nutrients all remain the same. BBA continues to be a problem, i had to brush them off every week otherwise the tank becomes unsightly.