The Easiest Way to Feed Frozen Fish Foods Place frozen food into the container – enough for about a week of feeding. Let the food sit out and thaw. Feed you fish. Place the remainder in the refrigerator.Click to see full answer. Similarly, do you defrost frozen fish food?Frozen foods, however, do need to remain just that — frozen. Once defrosted, they have either to be used immediately or discarded. Some aquarists like to thaw for a few minutes prior to feeding, but others prefer to offer a frozen block directly to the tank where it defrosts and the fish pick up on the sinking food.Likewise, what fish eats frozen? Frozen Food: Some fish will enjoy frozen food, such as shrimp, bloodworms, plankton, prawn, krill, or mussels. Pet stores often also sell frozen spirulina cubes for feeding herbivores. Freeze Dried: Tubifex worms and Mysis shrimp or other foods can be found as freeze-dried cubes. In this way, how often should you feed fish frozen food? your fine to feed frozen foods everyday (or rather at every feeding), but you do want to try and rotate your fishes diet a bit because feeding exclusively one food is going to lead to deficiencies.How long is frozen fish food good for?Fatty fish like salmon can be frozen for two to three months, while lean fish like cod or flounder will last up to six. Cooked leftovers: three months. Ground meat (beef, lamb, pork) keeps for two or three months; roasts, steaks, and chops can be kept frozen for at least half a year. Leftovers: two to three months.