The 55g tub of food is suitable for all tropical fish. TetraMin Pro Crisps are extremely nutritious and have been developed under a new low-heat process which ensures that the goodness of each crisp stays locked inside the food until it is consumed by your fish for maximum impact. TetraMin Crisps also contain a patented active formula which maintains a healthy immune system with a clean and clear formula which also produces less waste inside the tank. This benefit allows you to enjoy the beauty of your tank for longer without the added concern of additional cleaning requirements after feeding time. The product is provided in an air tight tub which protects the food from air, moisture and light damage