hi, i have a 1999 infinity hot tub that has a leak. it is a pretty big leak but im not able to locate it. it leaks about 3 inches a day. it is not leaking in the motor area. the leak stops when the water line reaches the seats. there are no jets in the area when the leak stops. im leaning towards a shell crack but with the color and texture of the shell it will be hard to find a crack. will dye help to find? also what is the dye called and where can i buy it? thanks