liquid cooling question

I just installed a Xspc rasa 750 liquid cooling kit on my i7 920. I always leave my computer on, even at night when im not using it. I have cooling system on a separate power supply. I noticed that my temp at idle is about 32c. If i turn the pump off, it is at 52c at idle. Would it be ok if i turned the pump off at night when im not using the computer? I'm worried about leaks and the pump wearing out. I'm a noob at liquid cooling. Am i worrying about nothing? Oh btw, i havent overclocked my cpu yet. Thanks for any advice.

You are worrying about nothing IMO. I would keep it on personally.