Vitapet Marine Master Holiday Feeder Twin Pack is a handy food supplement perfect for making sure your pet fish are fed while you're away from home. Simply drop into your tank and allow to dissolve. Recommended for pet owners when away from home for vacations or work. Shell-shaped blocks slowly dissolves to release food contained within. 2 blocks feed up to 10 tropical fish or up to 6 goldfish. Helps to contribute essential nutrients and minerals to maintain great everyday physical health and wellbeing. Suitable for coldwater and tropical aquariums. 2 x 20g feeders. Vitapet products are distributed by Masterpet, a company with over 50 years of experience. Created on the belief that life is just better with a pet, they strive to develop specific products for the specific needs of pet owners. Their products are always known for their quality and reliability. Looking for something to keep your water clean and healthy? !