You will need:
Activated Charcoal
Quilt batting
scissors
sewing machine - or a needle and thread if you want to stitch it up by hand
This is a nasty old used filter...
...snip the outer lining away from the frame and discard that and the charcoal from inside...
...rinse well and sanitize with a solution of hydrogen peroxide and water - and rinse well again - don't use tap water if your water contains chlorine...
...measure the quilt batting to make a pocket for this frame...
...I just lay it on top of the batting fold it over and cut around it...
...stitch up 2 sides if folded or 3 if not...
...slide the frame into the pocket...

...now you'll need the activated charcoal...

...open the pocket and pour in about 1/3 cup of charcoal...
...and there you have it - a sideways picture of a finished filter...
...our filters have the little frames or carriers that they sit in - so if yours does too - just slide it in - if it's a little too snug - carefully trim away some of the batting...

...then pop them back into the filter - and enjoy your nice clean aquarium water...































