I removed two Swords a few days ago to add some Fluorite and move the plants. So while they were out of the tank, I took the opportunity to squirt them with some 3% H2O2. I waited a few minutes, rinsed them off and put them back in the tank. This had ZERO effect on the BBA, no wilting, no sloughing, no whitening. I think it actually liked the stuff.
I also took out a lava rock with some Annubias attached and added some H202 to about two gallons of water. I kept upping the H202 dose, but it had no effect. I finally got out the bleach and dumped about a cup (all I had) into the two fresh gallons of water. The affect was almost immediate, the BBA started to disappear.
Bleach=Good; H2O2=Useless.
I also took out a lava rock with some Annubias attached and added some H202 to about two gallons of water. I kept upping the H202 dose, but it had no effect. I finally got out the bleach and dumped about a cup (all I had) into the two fresh gallons of water. The affect was almost immediate, the BBA started to disappear.
Bleach=Good; H2O2=Useless.