Thanks. I did go a little further in my investigation and found that while mono. lines float, making it ideal for topwater, co-polymers do not float, they have greater abrasion resistance, and increased knot strength and less spool memory.. I'm not sure if the flourcarbon coating of the P-Line CX makes it as invisible as a full flouro, (probably not) but it may help some.
I was actually hoping it floated because, if it did, I wanted to use it between the weight and hook on a Carolina rig - liking the knot strength and flouro coating - and I have a lot of it.