[QUOTE=Regarding BBA alone, I usually have problems with it when I have an increase in organic matter. If you want one point of failure I would look there. Some examples from my past experiences /mistakes that have lead to BBA: uncleaned filter, unvacuumed substrate, high fish stocking, overfeeding with live foods, unnoticed fish death, overgrown moss trapped debris, new wood still had some soft bark on it, troubles with CO2 leading too plant poor health. These are just observations not experiments but similar experiences have been repeated and reported by others.[/QUOTE]
Thanks for the response. I think based off your experience that my BBA problem stems from either Lack of co2 OR uncleaned filter. Ive got only 4 Otos and around 100 cherry shrimp in my 45G. It also has ada aquasoil so doesnt really need any vacuuming. I will try to clean the filter. Ive read that co2 doesnt solve bba problems so I dont want to go there yet since most of my plants are low light plants. I leave my light on in two 3 hr stints. 1-4 and then from 7-10. I dose seachem flourish once a week after a water change. So I dont know why my bba is spreading.