Gamma Blister Tubifex 95g. Highest quality ingredients, rapidly packed, sealed & frozen. Gamma irradiated. This completely eliminates any risk of introducing harmful parasites or bacteria into your aquarium, and also means that the food is completely safe to store in your freezer. 100% natural products and the wide variety available ensures that individual species of fish receive a balanced, varied and interesting diet. Blister packs are designed to dispense one measured cube of food at a time, leaving the rest of the product sealed within their separate blisters. A quick and convenient way of feeding fish. Colour-coded feeding suitability guide makes it easy to find the right food for your fish!