Random Packing For A 4 Column

LWTCS

Hey team,
Is anyone out there fooling with a 4" packed column diameter?
Anyone have any opinions about what would be an optimal size / girth for SPP or any other similar type material?
The column is a 4" x 80" (100 mm x 2032 mm).Trample the injured and hurdle the dead.

Salt-Must-Flow

Here's a recent topic.
I really like using Lava Rock. For my 3" VM the average size is .27"
For a 4", I'd probably shoot for a little larger while keeping all of the smaller pieces too. Later you could test the smaller pieces and see how that size compares. When I tried a smaller size the column flooded.

StillerBoy

Mash Rookie some yrs back (2012) explored the pros and cons of different packing for different size of column.. and I recall reading about 4" for SPP and lava rocks..
Can't be of help cause I've need experimented with 4", done lots with 1.5 - 2 and 3"..
viewtopic.php?t=30727
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