cmpowell,
Is the swap going ok? What did you decide? The sizes that NM Reef noted from the web site don't sound too bad. It sounds smaller than the crushed coral I have seen and used before I went to the new DSB. I hope some of your sand is in the smaller sizes. I am just going, in part, by the breakdown of particle sizes recommended in Dr. Ron Shimek's "Sand Bed Secrets". He lists sizes and percentages that are desirable. He suggests 40% should be 1/16-1/8mm (really small), 30% should be 1/8-1/4mm, 15% 1/4-1/2mm, 10% 1/2-1mm, and 5% greater than 1mm. I feel sure that there are many variations that can be successful, but Dr. Shimek's emphasis on the very small particles swayed me in that direction.
I hope everything is going well with the swap. Let us know how it comes out.