Way back in the 1970s ...
... when WOR from New York telecast a double feature of horror/science fiction movies every Saturday morning, "The Slime People" was one of the films. If my memory serves me correctly, it was usually teamed up with other films with similar titles, i.e. "The Gamma People" and "The Mole People."
As a child, I realized this was a poor film during the instances when it aired, but that didn't stop me from watching it. I do distinctly remember my mother commenting back then she didn't like it, particularly the gurgling sound made by the slime monsters.