I really can not answer your question but rather give you a comparison until someone that uses the Barr booster chimes in.

Seachem equilibrium and Barr booster although not the same are similar. Seachems product says that 1 tablespoon for every 20 gallons will raise the gh by 3dH. I am not suggesting you add that much. I think that would be more for the RO user rather than someone adding to a tap water.


Hope this helps until you get a first hand experienced user of the Barr booster.