醋精

yú gǔ tou shì tàn suān gài zì jǐ mǎi le píng cù jīng yòng suān bǎ tā róng diào ba

鱼骨头是碳酸钙，自己买了瓶醋精，用酸把它溶掉吧！

Fish bones is calcium carbonate, and I bought a bottle of Vinegar with acid melting it away!