Okay don't be mad, but I have neither the time nor the resources to do a water marble in my dorm room! So here is my only water marble I have ever done, and I know I have shown it before.... but its the best I can do.
I put a layer of White On by Sally Hansen before the water marble.
I used Ruby Ruby by Sinful Nail colors (Red) and Fly away by Sinful Nail Colors (blue) for the water marble.
Don't worry tomorrow will make up for today!!