Busy with life all day, I feel that I have really forgotten all about my knowledge, because many doses of fish are not clear at home now. Please don't laugh at me.

Busy with life all day, busy well, having fun and struggling in a busy life is a thousand times better than doing nothing. I feel that I have forgotten all my knowledge, but in fact, knowledge is learned while practicing, and knowledge needs to be accumulated. It's good to raise fish while learning knowledge now. The answer to your question is 40 mg. I wish you success in your career and progress in your studies.