How can sodium tripolyphosphate be effectively removed from fish?

Sodium tripolyphosphate (STPP) can be effectively removed from fish by soaking the fish in a solution of water and vinegar or lemon juice, as the acid can help break down and remove the STPP. Alternatively, soaking the fish in a solution of water and baking soda can also help neutralize and remove the STPP. Additionally, rinsing the fish thoroughly under running water and gently scrubbing the surface can further help in removing any residual STPP.