They apparently move to the surface as this states they rise once tripped. Here is an article posted on their web page where it states that they rise in the water once tripped.

http://www.offshoretackle.com/graphi...erArticles.pdf


In the following information it states that it takes 160 ft of line out to reach 28ft or 31ft of depth depending on the size tadpole used, that would be at least 60ft more than a jet 40 to reach 31ft and about 60 ft more than a jet 30 to reach 28ft. Following is a quote from the link provided below.

Quote{Q. I saw your add for tadpole weights and would like some more information on them. What are the two weights and how big are they? What depth ranges would they get a crankbait down to?

A. The Tadpoles are called OR36 1 (Size 1) and OR36 2 (Size 2). We don't go by weight; the depth for them is about 28' for the Size 1 and 31 for the Size 2 with 160' of line out. This is at 1.5 mph and is only about 10% less at 2.5 mph. Both were designed for stickbaits, spoons and spinners but time will tell how they react to big lipped cranks. I recommend putting a different length of line out and letting the fish tell you which is right. The same is true of the OR20 Pro Weight System.} END QUOTE


http://www.offshoretackle.com/questionstadpoles.html

I think I am going to pass on these, at least for now.