Tap water is just fine. Unless maybe you have really really hard water. Even then I don't really think its an issue. I just use regular city tap water.
Tap but I let it sit for 24 hours.
Mostly for my bugs, frogs, toads, plants etc.
The snakes get the same treatment because I'm just in the habit.
curiosity....why? what purpose does letting it sit for 24 hrs serve?
1.1 Pinstripe - Orion/Eos
1.1 Lessers - Typhon/Kali
0.2 Dinkers - Stella & Wildfire
1.0 Desert - No Name
1.0 Het Red Axanthic - No name
0.1 Woma- Cayenne
0.1 Cinnamon- Nutmeg
2.1 Mojave- No names
1.0 Mystic- No Name
0.1 Mahagony- No Name
1.0 Black Pastel- No Name
1.0 SD Tiger Retic- Thor
0.0.1 Green Tree Python (Apollo)
0.2 Labs- Daisy & Ruby
Chlorine evaporates from tap water within 15 minutes.
I personally used to filter my water, but now I just Tap it.
But snakes get all of their liquids from their food anyway. Providing a water dish is more of keeper thing.