the filter is not designed to pick up poop off the bottom of the tank but rather filter out the dissolved stuff in the water. Gravel vac weekly should take care of the big poops lol, but im thinking you didn't cycle it correctly if every week your rinsing out your filter pads you basically kill the bacteria growing on the pads weekly thats why your water will remain cloudy. what you should do is just keep the pads in there IME some pads can stay in the filter for 6months to a year if your doing water changes and gravel vac weekely. i would say continue with the cycle leave the filter pads in the filter