I had a python, then an aqueon, then a python. I wore them out. I did find the quality of the hose dropping with each one. The Aqueon didn't last very long.
I don't use the water bed water changer hook up on the sink, as while it's fast, it wastes water. I use gravity to remove water. I siphon tanks into a 1 3/4 pool hose, rigid sided but flexible. It goes into a floor drain in winter, and the garden in summer.. I add water via a potable water quality garden hose, permanently connected to a utility sink. I add dechlor (I just have chlorine) before I refill.
Most of the chlorine gasses off. The only negative I see if I forget dechlor is my killies lay no eggs for a couple of days after. But I don't want to subject the fish to chlorine, so I am generally very careful. It isn't the end of the world if you very occasionally mess up.
Chloramines are a different story. They're deadly.
I have a northern problem with water temperature, and a quantity issue with a large fishroom. I can't leave water to sit. I use too much. I have a water heater and do a mix. I tell how the mix is by touch, or by an infrared temperature gun.
With quarantine tanks, the new water is always a degree or two warmer than the tank. I don't like to encourage Ich.