It is best to use river water, pond water,

Everything you put in the lobster will be eaten. It may be an environmental problem.

Put a few grains of rice, 1 diced meat, diced fish, diced snails, cooked potatoes, cooked corn, etc.

Don't use too much every day

Don't put it in a place where the water is too clear and bright. Lobsters eat in the evening and at night.