I use Brer Rabbit Blackstrap Molasses - I sure do not overdo it. It does not negatively have any effect on taste nor have I ever noticed any strange aftertastes - that Brer Rabbit brand is an excellent source of Calcium, Mag, Iron & Potassium.
Really work great on strains that are N sensitive, like sativas.
Has no N, where the Cal/Mag bottle stuff has significant N.
ditto, same experience