Hi Tony,
I'm following Ron Shimek's guidelines as best I can that I found here:
http://www.ronshimek.com/deep_sand_beds.html
Particle size distribution:
0.1-0.5 mm = 80%
0.1-0.75 mm = 15%
1.2-1.7 mm = 4%
1.7-2.5 mm = 1%
Here's a link to his discussion about it:
http://forum.marinedepot.com/Topic70...hlight=dsb+0.1
I am trying for a 4" or better depth.
Mitch