10 Gallon Help

[Mizgo]

Hello all,

This is my first time posting outside of the welcome area and would welcome your advice!

I have had a 10g for the past few years and the fish are still the originals! I have 2 Black finned tetras and a small "cory"? I recently had my pleco die but it almost seems like wasn't eating anything much less the algae, was he just lazy?

I think these guys are in need of more fish friends, surely something to help clean the tank, maybe another pleco or snails? what is the best option at this point for cleaning. I would also like to get a couple more tetra's because they are great fish. What and how many could I get away with in the tank without overcrowding the fish?

Thanks in advance for your advice!