Test after another until I reached more than 40 iterations each taking more that 8 hours to sim over a span of a month, finally reached an acceptable result.
Tank dimension: 22 x 25 x 1.8
Flip particle separation: 0.018
Flip sim: 9h
Flip points count : 26m
ww particle separation: 0.008
ww sim: 2h
ww points count :6m
Render: Redshift 1min per frame.