I honestly thought my tank had become cursed, lol, and just plain couldn't imagine how I'd ever get rid of what I think was the BBA - let alone the other types... But then just at a very slow rate, the algae backed off and I honestly can't see any now...
No doubt that stuff will still be lurking and would surely break out again if circumstances were right for it... The only bit that remains is the bit beneath the sand where it meets the glass, but even that has the top several millimetres gone now, where I guess the snails & shrimp have been able to get at it...
One change I have noticed in recent weeks though was that pretty much all the stem plants in the tank have been steadily under attack by the Rabbit snails and/or the Faunus snails, to the point where they appear to munch through the stems at the base and destroy the whole plant...!!! Then it dawned on me that there's probably a lot less natural food for them now with the algae all but gone... So, it didn't take long to twig that I should re-evaluate my feeding routine and shift the balance so that there is far less protein based food and increase the algae wafers... This is looking to be working now too and the various snails can at least get to the algae wafers in time, whereas with the previous emphasis on flakes and such like, it was all getting snapped up by the Tetras etc...
The old learning curve never stops with this hobby, eh...? I'm sure that I'm still a ways to go in terms of getting things just right, but do at least feel like things are going in the right direction now, instead of the wrong direction - a major shift indeed...