Tony I'm going through the same problem with my planted tank and I getting to my wits end I didn't know a FW tank could be such a PITA. Mine seems to have stated growing on tiger val and just spread everywhere and the CO2 think helps it. I am going to try Excel this week it is supposed to take away from the algae and give to plants from what Henry at natures corner tells me but be careful it can kill off a tank quick DO NOT OVERDOSE
....oh a scavenger a tang with not survive to long in a freshwater
