I have 2 gallons of "drinking water" that you buy at the store that I wanted to use for my tanks. Do I have to put dechlorinator in it? And it sat in the car for a few days (it gets pretty hot in there), would that affect the water for fish?
Because I bought it so I could have more gallon jugs (I use the jugs to fill with water for WC's) and we don't need the water to drink, so I wanted to use it for something.
Well, 2 things: just make sure the temp matches (you probably know this) and it would be a good idea to test the ph because it might be way off from your ph in the tank and this might cause problems if the tank is small.