I would get a Danforth anchor, and stick with rope..
Here's a pictu http://www.woods-group.co.uk/mooring...rth_anchor.jpg
Should run you about 100 bucks... we use one on a river with moderate
current, and similar depth, and it never moves...

-j

"Ree-Yees" wrote in message
...
I have an anchor (came with the used boat) that looks like this:

http://www.basspro.com/servlet/catal...&hvarTarget=se
arch&cmCat=SearchResults

Mine is probably 15 pounds. When I anchor in 15-20 feet of water the boat
will slowly still move away. After about 30 minutes I will have moved
15-20
yards back out into the lake.

What style of anchor do I need for a 19 foot sea ray?

--C