I guess I'm not explaining myself. I thought this was a pretty generic question; what do you use for dye?

Ok, apparently not. So asked if there are any DIY dyes people use.

The situation is that I have a leak. I see it bubbling out and running around the far side of the berm and into the creek. I need to find the hole INSIDE the pond. When the level lowers the leak stops so I don't see how that helps me. That's a lot of shoreline to look at and how would I know that's where the leak comes from?

So what I'm looking for is a DIY dye that I can drop into the water where I think the hole is INSIDE the pond and watch to see if I was right. It seems to me that if I dye ALL the water (say yellow), and the water outside the pond turns yellow all I have done is waste an afternoon. I KNOW ITS LEAKING. I need something that I can use in a specific area and watch to see if it comes out of the leak on the outside of the pond. Is this not how it's done? This seems pretty intuitive to me. I just want to know what to use and I would think it needs to be heavier than water. The pond dyes I have asked about will color a large area. That doesn't seem to be what I need. If you think I'm crazy just let me know. You won't be the first.

People keep saying they use dye. I'm just asking what they are using.