May 31, BBA UPDATE: gone. Yes, BBA is gone! Here is what I have done to make it disappear from my tank for the past month:
1. Got back to regular EI schedule by daily alternating macros with micros. Dosing 1/3 less than the recommended EI, just because I perform water change every 2 weeks.
2. Four weeks ago, after water change, I added recommended dose of Excel (the high dosage recommended after water change). That destroyed completely all BBA I had, but also damaged some of my Vals (too bad!) that have now recovered
3. Raised Co2 a little until I could see pearling on plants (tanks Tom for the tip I read on another thread somewhere!). As a reference, I raised Co2 to reach 80ml per minute. And I'll keep it that way from now on!
So... this has been my recipe to get rid of BBA after 8 months of struggling!
I think the following points helped a big deal:
1. Excel helped to get rid of everything bad was out right at that moment (BBA)
2. Raising Co2.
3. Getting back into regular fert routine without being afraid of "toxicities". I mean, all my plants got better, Alternathera Reinikii included which was struggling in a long time! In particular I think the increase of micros helped the most.
I hope my experience could be useful for other people. I'll keep watching my tank to see if that damn BBA will ever come back, but so far so good! Thanks again to anyone on this forum for the help given.
Best,
Fab.