All good.
Iron pot: Stewing pork ribs in an iron pot can replenish iron elements, and the material of the iron pot conducts heat quickly, so the stewed soup is richer. Braised pork ribs in an iron pot is relatively slow, taking about 1 hour.
Aluminum pot: The thermal conductivity of aluminum pot is three times that of iron. The time for stewing ribs is short. The surface material of aluminum pot is relatively soft and easy to be damaged. Long-term use may easily affect the body.