My dracaena has started to develop some brown leaf tips and white spots all over the plant, i transplanted the tree into a bigger pot about a week ago and ever since it’s been developing those spots. The tree has indirect sunlight and I water it once a week, but not with tap water. I don’t know the soil pH because I don’t have a tester since i’m new to gardening. I’ve moved it into a different room about a day ago to see if the room that it was in was somehow affecting it but no changes. The temperature stays at a constant 73-75 degrees inside my house. Please help me figure out what’s wrong.