In other, more relevant to the thread news, it appears my excel plants spray down cause some of my buce and anubias leaves to rot and drop off...whilst the BBA help strong and never wavered. I truly hate this algae.
Excel spray is not very precise. You want to put Excel directly on the algae and not on the plant, a fine paint brush is much better for this and even then you can still get some plant melt. You don't want a long contact time on a plant(seconds not minutes) out of water especially with concentrated Excel.
It is safer to use an enclosed area(e.g. 500ml container upside down) inside your tank, greater concentration than the whole tank but still diluted Excel syringed in, instead of direct contact with plants which is then circulated around for a few minutes. @Deanna
described and uses this method.
I just prune off leaves/stems with BBA, the parts of the plant that allow it to grow on them are not healthy(most not worth saving) to begin with.
It is really frustrating to get any sort of algae on Anubias or Bucephalandra as they grow so slowly, it hurts have to trim leaves that take months to grow but its still best for the plant. Even hair algae which is easily killed by general tank Excel is still difficult to remove even when dead. It takes weeks not days to completely remove dead Algae even with Otos, Shrimp, snails etc.
I got BBA in my old scape on some plants and on wood mostly. Painting the wood was highly effective, however a little spilled onto the neighbouring plants and melted them or created white spots.