About 6 years ago I found a product on Ebay called "Party Pool". You mixed it with water and poured it in your pool to make the water Lagoon Blue. I added it for a Luau party I had. It did leave a blue residue at the water line for a while but eventually the chlorine washed it back off. Have any of your heard of or ever used it. Is it bad for the pool and does anyone no where to find it? I have searched and can't seem to find it anywhere?