Question about the Python vacuum system to do water changes. It appears that this device connects to the faucet at the sink. At the faucet, a value allows the water to drain from the tank into the sink or switches to refill the tank. Assuming I have this device correctly described, my question concerns refilling my tank directly from the faucet. My water comes from a well and the water temperature is going to be very cold. Well depth 175', so water temp should be approximately 54 degrees. That is true if I let the water run long enough to empty the holding tank under the house so the water is coming from the bottom of the well. In the winter, the water in the holding tank under the house is surely lower than 40 degrees. If I do a 20% water change, I am going to have a significant temperature drop and I assume shock the fish and plants to death. I obviously do have a hot water heater in the house, should I regulate the temp by mixing hot and cold via the faucets? Thoughts and recommendations please.