I am planning on putting out some crappie beds soon. I am going to make them out of pvc. I have heard that pvc can be hard to find in the water. I know a lot of you fishermen have come up with a way to make pvc more visible under the water and easier to find on your graphs. Since I promise not to steal the locations of your beds could you give me an ideal of how to sink mine and easily find them next time I look for them.