Can i use this food for my Cory Catfish?

http://www.petco.com/product/112088/New-Life-Spectrum-Large-Fish-Formula-3mm-Sinking-Pellet-Fish-Food.aspx
I know its for larger fish but this is the biggest sinking pellet they have for fish. I give them the wafers from this company and some frozen foods but i want more variety for them. I was going to use the Wardley sinking pellets but saw that copper sulfate is in it and i refuse to feed that to my animals. So can i feed them that?

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