I have a Laars Pool/Spa heater that is leaking water and has possibly turned the water in my pool blue and stained the pool walls blue. My pool maintainer has drained the pool and flushed the system. My question is about the care that was given to the pool and system. Could the heater be damaged due to poorly maintained chemical balance, or do these things just go bad? I have bypassed the heater until I can afford another heater or is it possible to repair the heater?