I often look at overcrowding in several ways. One is the space for the fish to live in a somewhat normal way. The second is how much extra work it may/may not require to add fish. So with the info you've given and if you are willing/able to do any extra work to keep the water good, I would feel a pleco is okay. They may not be full solution to the glass, though as they tend to be a bit willy-nilly in the way they leave streaks that look like kids have been drawing on the glass!
But then I also want to add that it does always pay to watch and be aware of potential problems. Tanks are not something that stay the same from starting to finish. I find they are constantly changing as plants and fish grow and my interests change. That means that I try to look ahead to see trouble before it actually comes up. You will need to do the same and it is more important to do it when you begin to press up closer to overstocking.
Your angels will grow as well as the rest. Nothing unusual but just something to be aware of and then you may need to make some changes.
Raising fish can be like raising kids. It is a constant struggle to stay ahead of the decisions?
But then I also want to add that it does always pay to watch and be aware of potential problems. Tanks are not something that stay the same from starting to finish. I find they are constantly changing as plants and fish grow and my interests change. That means that I try to look ahead to see trouble before it actually comes up. You will need to do the same and it is more important to do it when you begin to press up closer to overstocking.
Your angels will grow as well as the rest. Nothing unusual but just something to be aware of and then you may need to make some changes.
Raising fish can be like raising kids. It is a constant struggle to stay ahead of the decisions?