I add lots of ferts to this tank and have not visible algae anywhere. 30-45ppm NO3, 10-15ppm of PO4, 1-2 ppm Fe added weekly.
BBA has never entered this tank.
My 180 has it, but only a very very minor amount and only on 1/2 dead leaves after a trim. Maybe a little got on the wood a couple of times.......water change and as spray bottle of Excel, it's dead and does not come back. You can do the same for algae non living scape materials.
H2O2 is cheaper and more available and can work the same.
I've had BBA enter in a dozens of tanks over the decades. Before excel was marketed etc.
CO2(filters clogged?, tank empty, disc clogged, too much off gassing, poor measurement fooling you into thinking you have enough), trimming it off, good focus on the plants,
Limiting nutrients did not help. We specifically tried this in 4 different tanks using both P and N over 6 months. BBA still was there in all 4 cases.
Light also, you can find BBA growing in very dark sections.
Excel will help but it's a dose response.
Plants have a higher tolerance than most algae, so only the upper ranges of dosing, eg, 2-3ppm for sustained periods will help, 1-3 weeks etc of daily dosing to this concentration, not the labeled dosing suggestion.
SAE's, and shrimps do seem to really be effective at keeping minor algae issues at bay, but simply good ferts/CO2/light is the key and always has been.
The rest is horticulture, care, staying on top of things, attacking the problem before it gets out of hand, high plant density/coverage, keeping CO2 running correctly, cleaning filters, good frequent water changes, pruning, perhaps spraying the non living material with Excel during a water change etc.
Prevention is worth a pound of cure.
If you do get algae, then expect to do FAR MORE work to get rid of it, than say my 120 Gal tank which has never had any algae issues. Once you get the plants growing nicely, you can prune your way off of most algae issues.
Often takes a lot of manual removal. Pisses you off however if it just keeps coming back though.