Last night I order a Petco 360 view aquarium quit 2g. I want to use this for my Betta to upgrade his house from a fish bowl to a 2 gallons tank. My question is, is it okay to add distill water and add the fish like I did when I first put him on his bowl? I've had him for 2 months and every time I change the water I use distill water and he is a happy fish.