Well, if it was solid it would have some bouancy because of its shape so I think it would tend to float.
I just did an experiment in my kitchen.
I filled up a jug with water,
then I filled up a little glass with water and dropped in a little food colouring.
You need very little food colouring to make the water go a rich colour.
so, I figure that the density of the coloured water must be almost identical to the density of the tap water.
Now I put just a drop of the coloured water into the jug.
It broke the water tension when it dropped, so it did go a little under the surface.
then it settled and stayed right where it started.
Eventually after a considerable period of time, it dispersed/disolved and became one with the water.
Anyway, my conclusion is that if there is no bouyancy effect than the introduced material would stay at the level where it started.
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