Cant see any reason why you shouldn't do it, if the loops sealed then dust wont get in. Much better than having water sit in there for a week (stagnant water accelerates corrosion).
Just a precaution, dont hook up your pumps power while its set up (its probably wise to not have the front panel power button connected at all) as you wouldn't want someone to try and turn it on and burn out both your pump and everything that's on water.