Actually Lisa, you don't need to change the water when you are rooting brug cuttings, and it works better if you don't. They produce their own rooting hormone so if you change the water they lose that.
I've had brug cuttings sit and grow in water for a month, and even bloom! Just added water if it was getting low until I could get around to potting them up.
Lately, I add Perlite to the water as it seems to cause the new roots to be more sturdy.
As far as blooming, I move mine to a spot where they get morning and late afternoon sun, but are shaded through the middle of the day. They bloom great there, and as the season gets more mellow, they can take more sun. They're in full sun all winter, and last year I had blooms every month of the year. Some years, if it gets cold enough they do stop blooming though.
If you're going to bring them in for winter, you could keep at least one blooming if you have a big, south facing window.
