in aquaculture or aquaponics i dont recommend tap water because of the chlorine/chloramines but bluegill do have a bit of a tolerance to it.
A few years ago, i was topping off the tank from the tap and i forgot about it and the hose ran all night.. overflowing diluting and replacing my amber colored aquaponics water with crystal clear tap.
I did treat the chloramines with aesorbic acid (vitamin c) the next morning, but i lost zero tilapia, zero bluegill, but about 80% of my channel cats were dead or died within 24 hours.
