I am going back to PetsMart this Friday or Saturday. I will buy a veggie clip. Should I rinse the slices before I feed them??? How large of a piece should I put in a 10 gallon with two juvenile Fantail Goldfish??? Do all PetsMarts do the thing where you print of what you want from their website, and if it isn't the same or a cheaper price when you get there, they will give it to you for the cheaper price??? Can you bring in catalogs that have stuff cheaper in it and they give you the cheaper price??? I go to the Petsmart in Knoxville, Tn.