Blue,
Where do you get an eel like that?
You can get the pool filter sand at hot tub and pool places. They should have it all the time. You can also get it from hardware stores but it may be seasonal. I could not find any at my Lowe's or Home Depot.
I washed it quite a bit in buckets and then used a cup covered with a lid to lower it to the bottom and had no issues with cloudiness. So far I like it.