Thank you.yes sounds about right 80% is fine in course of a few days,can replace with new ,live sand,or cleaned sand,
clean with fine net by hand in series of sw wash buckets ,should get snails that way
I think this is the route I will be taking. When the water level is low for a water change, I'll also shop vac out maybe a square foot of sand. I'll initially sift that through a strainer to pick up any snails and shells that may have been caught up. Given how disgusting this sand is, I will probably plan to replace it with new live sand rather than wash, store, and reuse.
Thanks for your help and input