they are safe and sound with an blue phantom its whole life i would say. Id say every pleco there is out there works with smaller fish. Ive never heard of an pleco activly pray and hunt on small fish.
would be great. A lot of pleco species live in area with a lot of small dither fish. As the dither fish schooling around, it create the sign that it is safe and no predator is around. And that bring the pleco out more often.
Agree with the others. The only time there would be risk is if the tetras come down at the ground picking up crumbs and the pleco moves over them. This would be extremely rare. And with the fish being fast, they would get out of the way.