As of this morning the BBA is essetnailly gone form my tank. I attribute this to the Excel Flourish. I double dosed 1x and turned off the CO2 for a day or two. Turned my tank very cloudy. Three day slater i turned back on the CO2 and the tank cloudiness went away. Then about 5 days later I did a 50% water change with tap water. Now 3 days after that the BBA has evaporated. Excel did not affect the fish, but melted all my val within a day or two (except for some roots that seem to be alive) and crypts. Everything else is fine. I am happy. Good luck!!!