Water treatment

I am still working on the water drop project. The amazing images are different in so many ways. I have used colored gels on the lights to get some really beautiful colors. I have used flowers and colored objects placed between the drops and the light to create interesting colors and patterns. I have tried food coloring the drops red and dropping them into clear water. All have made for some great effects. But, the one effect I am still striving towards is to get one drop colliding with another. To date the best I have achieved is two drops side by side at the same time.