My experience in past with trying to rinse clay product's such as Flourite,lava rock,and current use of Safe-T-sorb in present application,, is the more one rinses clay material ,,the more comes loose.
Quicker rinse result's in cloudy water for a few hour's to day's with moderate to heavy flow from filtration.
Just sayin.
I might want to rinse the clay pellet's fairly well, but not spend too much time trying to get water to run clear with clay.
This might help with clarity of water in the aquarium and after a few day's of placing the pellet's in filtration system,I would clean filter media.(mechanical)