I hope you guys can help me figure out my vanishing water issue. This usually happens in the middle of the night (of course). I will open up the cover and half of my 350 gallons has disappeared. If I open up the side of the spa and look inside it will be wet on the bottom but none of the lines are wet. The circuit breaker will have tripped also. This happens about every few weeks now. The spa is about 10 years old. Nothing real special about it, it has the heater, pump, filter, ozonator. It is fiberglass and about 6 feet square. I can access the entire bottom since the shell is surrounded by a wooden frame where you can remove all the panels. Any ideas?