What can be mixed into the ink for calligraphy to make the effect better?

I always add a little water, and then when I write, I like to put my brush in the water first, then let it eat ink, and finally put a little thick ink on my head before writing (like Chinese painting). As for your saying that the cursive script written is not smooth and round, it is not easy to answer (1. Grinding temperature problem 2. The quality problem of your inkstone cover. Writing question 4. Paper problem ...)