Tetra Holiday provides your fish with an optimum and reliable food supply while you are on holiday and lasts for up to 14 days, depending on the size of your aquarium and the number of fish. Thanks to Tetra’s gel food technology, this holiday fish food is produced on a gel basis rather than as a gypsum block. The main advantage of this is that the food does not negatively affect the water quality in the long term and therefore the water values remain stable. The gel food block with Tetra’s BioActive formula is 100% edible and contains all the essential vitamins, trace elements and minerals that fish need to stay healthy and that are perfectly tailored to their needs. The holiday food is enriched with daphnia to make feeding fish during your holidays a particularly tasty experience. The aquarium fish can nibble at the block as needed, because it does not dissolve by itself.