The GDA will go away rather fast, turn the filter off, clean the glass good at next H20 change, then change as much as you can.
The BBA will not just vanish, you will have to remove that by hand, it will not grow back if you keep running the tank as you are.
The tank will be spotless clean of algae soon, then you can stop the Excel and enjoy growing healthy plants, this is when you can start tweaking the light and C02.
Congrats Patrick, sounds like you are the road to recovery...lol
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