No Zozo, not yet, but I won't be for a long while. I am getting by as it is. In terms of BBA, I haven't looked yet properly in that newly overstocked tank of mine. But it seems BBA hasn't spread it's paws yet. I had some micro deficiencies that I had to sort out and they were a sore to the eye, fairly obvious. Someone above mentioned decomposing driftwood. The one I took out from my BBA tank wasn't looking good. Parts of it fell off as it's pretty old, but there was not one bit of BBA on the driftwood ever that I saw. However, I think the organic waste it releases in a tank is pretty insignificant in the big scheme of things. Plus mine was a heaven for all my fish as a retreat.