1, mussels bought from the market can't be eaten all at once. If they need to be raised for a period of time, you can take a basin, put a proper amount of tap water (the height is not higher than mussels), then put a layer of sediment at the bottom of the basin for mussels to inhabit, and then put the basin in a cool and ventilated place, which must not be placed in a place where the sun shines.

2. If the feeding time may exceed 3 days, you can feed one and a half spoonfuls of soybean milk every 5 days.