The netfluidflux usually stops when the amountor concentration of osmoticactivemolecules is equal (the same) in the twoareas (compartment)
For better understanding let's explain what statementabove means
Net fluid flux simply ends when the rate(concentration) of the substance is at the same proportion in both areas. It does not implies that movement is not taken place by molecules of that substance butthat there is no finalmovement in onedirection simply pit it that the molecules of substance are equallygoing in bothdirections (area).
From the above we can therefore say that the answer The net fluidflux usually stops when the amount or concentration of osmotic active molecules is equal (the same) in the twoareas(compartments) correct