Hey Jim, I've heard the 20% but I find that's way too much for me. I guess I like the vg and my
tanks are wicked for it. I only use 3-5% DW in 100% vg, sometimes I include 1-2% saline in that 3-5%. My flavoring is between 3-6% . Regardless I like the performance of the thicker
juice. But that's just me.. I find it to be richer; and obviously not watered down.
18% flavor in 50/50 not sure why you would need to add dw at all, I would think 1% saline would be enough. Unless your trying to achieve something with the saline.
This isn't a right or wrong answer, just what I do.
I recently got some vg from wizard labs and was very disappointed that it was watered down quite a bit. Looks like 10%