Can I use bottled water for a fish tank?

Hello! I just have a small question about fish water. My tap water were I live is horrible, we can't even drink it, so I can't use tap water for a tank. I was wondering could I use the gallon water jugs, of course I would use conditioner and such for the water. Or could I just buy the Betta water bottles... show more Hello! I just have a small question about fish water. My tap water were I live is horrible, we can't even drink it, so I can't use tap water for a tank.
I was wondering could I use the gallon water jugs, of course I would use conditioner and such for the water.

Or could I just buy the Betta water bottles for the fish, could it hurt other fishes such as guppies or goldfish?
Thank you! 💕
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