You've got a lot of rust in your water, which is why it's leaving an orange ring. I used to live in an OLD house that had the same problem. The pipes were old and rusted out and caused rusty, orange water that smelled and tasted almost metallic. It always stained the toilet, shower and sinks. It was disgusting. I never gave my reptiles that water. I went and bought them filtered watter by the gallons and that is my suggestion to you.