The ratio is merely a guide to prevent wasting any one particular nutrient.
It really is not an issue sinc eI can have 20ppm of NO2 and 0.4ppm of PO4 and still have great growth, other issues are light intensity levels, which if lower, can provide a large margin of wiggle room in a routine and a ratio. I can also have good growth at 10ppm of NO3 and 2ppm of PO4.
Main thing is to add enough NO3/PO4 and CO2.
I hated this algae perhaps the most of any. While being able to get rid of BBA a long time go, I would still have to clean this off some client's tanks but I never got it t home.
I added the PO4 and never had it again.
Still, I like when others find the same results, I never quite trust myself and my own observations, I like to discuss them to see if others when they control their parameters well, find similar results.
It should be noted that algae presence presents an opportunity to improve plant growth whenm seen.
Each algae provides a window into the tank's nutrient and environmental parameters and are bioindictors of the system.
In this manner I can look at a body of water or a tank and know what is lacking in the plant growth partly by the algae and partly by the plant's themselves. I cannot see the plants, but the owner can, but the algae is fairly telling........