When should I change the water including antibiotics cocktail for antibiotics-induced microbiota depleted mice (AIMD mice)?

Hello, fella researchers.

I am trying to make AIMD mice for my study.

I have seen many papers to find method.

The antibiotics cocktail including ampicillin (1 g/L), neomycin sulfate (1 g/L), metronidazole (1 g/L) and vancomycin (500 mg/L) will be dissolved into the sterile drink water and provided to mice for 4 weeks.

But, I can't find when should it be changed. Every once in two days? I can't find.

So, If there is anyone who knows this or did this before, please help me.

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