Yes, lots of variables, like does the water start out at 90* if your in southern waters or 50* if your in northern. I also have no idea of the BTU capacity of the frig. Obviously more BTU would heat up the water faster. Just wanted to point out that there is a limit to the 100 gal heat sink. That limit being the point at which the frig turns off on a temperature limit switch. And probably at the worst time possible.
Rehoboth Bay/Indian River, DE
S/Y KJ, Helms 25