Inconsistent Particle

I finally designed a waterfall but the way it works i need to but different copies of that particle next to each other. The issue I am having is that there is a gap in the particles spawn, which is fine, but next to each other it looks funny. is there a way to maybe make the materials spawn at random times.

Update: For some reason my graphics card crashed as I was using cascade to edit the settings of the particle emitter. I’m using GPU Sprites