I'm going to clean my fish's tank tomorrow and bought a jug of water today. Since I heard of people using milk jugs for storing water I figured it would be a good idea to pour out the water in the jug and refill it with tap water. (Last time I changed 50% of the water I just filled the 1 gallon fish tank I bought before my 2.5 gallon and let it sit out overnight.)
Do you leave your water out before refilling your tank or to you just refill it right out of the tap? Does it really matter if the water sits out for a while first? If you do let your water sit out for a while what do you keep it in?
I know I have to let the water warm up with the heater first and add water conditioner as well.