I would use it up. No point in wasting $ spent. Like a year ago i shut down a koi pond, and had like 2 lbs of koi pellets left, i used it up on my cichlids by just substituting half of their normal pellets each feeding.
tetra min isn't that bad years ago that was a high quality food. Your fish are sort of common and will do fine on either product. I know the tetra min will pollute your water quicker though. Tetra min was all I used for years until NLS came out and I never looked back. Again tetramin was developed in Germany and was a good staple for years