I’m sure you will do fine!!! Keep us postedNone of my plants get fresh tap water. I have loads of tubs of old aquarium water from water changes. I also squeeze the gunk out of my filter floss/sponges into the water too. It's full of nutrient, maybe too much nutrient for my calathea?
Time will tell now. I'm glad you guys have given me the heads up on its fragility anyway.