i use to buy distiled water from the jugs from the store, but i dont think the boiled water works well becuase people in differ areas have differ amounts of stuff inthere tap water, this is what i use now, my dad told me the drainage pipe of the AC, he water that comes out is distilled water,
i tried it on a vft for a couple weeks, it grew, didnt die at all, so now i get my distilled water from the drainage water pipe from teh AC, it has saved me lots of cash, and all i do is take a empty milk jug (1 gal) and stick it under the pipe and it drips im guessing 5 gallons of water a day? from dawn till dusk
i just keep the same 1 galon there and i use it for my plants and it refills in like 2 hours, its just dripping water, which is distilled, try it out see if it works, i personally think thats betetr than boiled tap water, and its much cheaper and saves loads of time, i could have like 8097987698786958 jugs of water right now but i just keep that one there, when my collection expands ill have 2, switching intervals, hehe
all i can say is try it on 1 plant for a couple weeks and if nothing happens its ok