Instruct: Classify a given Amazon review as either positive or negative.
Query: Excellent mainstay food

This is solid fare, especially for smaller fish. Cheaper than Spectrum flakes, I believe it's actually superior. Of course Tetra Marine Flakes should be supplemented at least occasionally with krill or an appropriate equivalent source of protein (pellet food such as Spectrum Thera +A is a good choice) and seaweed or Tetra Veggie for those fish that need greater vegetable intake.