New to this but we have an automatic cover that has been on since opening the pool back in mid april. The pool has not been used but i monitor it throughout the week. The chlorine levels started at 4-5 and raised to 6 during first week so i turned down the chlorinator to .5(was at 1.5 from pool company that opened). Over last few weeks it is now up to 7.5. Should the chlorinator be off since pool is not in use? I assume since the cover is on and the chlorinator is on is why it is slowly rising, since it is not evaporating or eating up anything? If the cover was off would i leave the chlorinator on?