Product review (4 stars): THESE WERE FINE..
THESE WERE FINE... THEY FIT AND WORKED WITH NO PROBLEM  YOU HAVE TO RUN THE WATER THROUGH IT FOR A WHILE UNTIL THE CHARCOAL COLOR IN THE WATER STOPS.. JUST ABOUT 5 MINUTES. BUT THEN IT IS GREAT. I FILLED ABOUT 6 LARGE TUMBLERS OF WATER AND THEN THE WATER WAS CLEAR. IT WENT FROM GREY TO CLOUDY TO VERY CLEAR.