Seachem Clarity Bonus +30% Free 325ml

I am confused if this actually works . . I have been using it for 12.5 gallon tank when its a bit cloudy but the result are not satisfactory . . Sometime the water clears and sometime it remains as is . . It seems it only less cloudy waters

Quick delivery, came as described with the additional 30% free. Great value

Sent a basic item which doesn’t have extra as advertised!