I'm using a 24" Sniper and for my first time out I shot for getting the proverbial "V" as my starting point for Water Velocity.
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Seemed to work OK.
Grizzlies cleared themselves OK with a little help from time to time.
Don't know if I lost anything (but probably did).
Fluid bed was not as "fluid" as I thought it should be, but I did feel movement around the the Tubes themselves.
And that probably allowed for some loss of fines.
Next time I will allow a little more time for set-up as far as making up water diversion walls etc to increase flow.
I know this defeats the purpose of the Sniper as a sampling tool, being able to drop it in, run some material and move on.
But it is what it is...a drought.
Good luck and please let us all know how you did.
G