Hi,
I'm new to this forum, but used to successfully keep Mandarins.
Please try feeding him with lobster eggs. Purchase some air line and attach one end of this to a wooden kebab skewer with cotton to keep it straight and enable you to "aim" the food at him. If your water flow is very high, turn it off whilst feeding. Suck some up in the tube, put it into the tank, and aim it directly at him, gently blowing on the other end! The lobster eggs will expel where you are directing the tube, hopefully right in his way. This will enable him to get a direct food source until your pods are up, but I would also advise feeding this way no matter what as an addition.
I sincerely hope this helps.