We have always used propane, until now.She must have been waiting for you to notice her need a LONG time!
I wonder what the fish think (do they think?). They live with way more light in an aquarium than in nature. Not sure how constantly changing colors would affect them.
I hope it is a LOT less than here, I have to pay over $4/gallon. And make sure the quote isn't the "new customer" price that goes up after a while. They often charge more per gallon if you don't use a lot and have a minimum delivery quantity. If you use enough you can "pre-buy" to lock in a cheaper rate. We don't use enough to do that.