Hahah, PP, I was confused at first also. I think what he said was:

1. Pet shop owner feed cichlid pellets and guppies to large cichlid (guppies here is the food for the cichlids)
2. some guppies were not eaten by the cichlid
3. So, the guppies eat the cichlid pellets

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The nose runs and the feet smell - go figure
Steven