How many small algae wafers should I feed my mystery snail each day?

I just bought a black mystery snail today and a packet of small algae wafers. The wafers are thin and about the size of a piece of dog food. How many wafers should I give my snail and how often? Thank you!|||I put 1wafer in my tank in the evening That is also for my frogs and fish. I do this every evening. If i don't give them fresh veg. The link i put below may help you out. I have 2 snails and there both growing. Good Luck|||1 algae wafer once a day is fine.