Water Softener, bypass only for cold water
I am getting my planted tank set up, and its pretty much there except for no fish yet! However I have a question.
My house has a water softener that is installed before the water heater, so the water heater contains all softened water. It has a bypass on it, but the bypass will only give me cold unsoftened water.
Up until this point, since its only plants when I have been changing out the water/cleaning out from moving plants around, I have been okay with using the cold unsoftened bypass water.
However, when I do finally have fish in the tank, I am concerned that this will cause some temperature shock when I do the water changes. Using only the cold unsoftened bypass water (that is getting to long too type, should I call it CUBW?) does make the temperature of the entire tank go down about 6 degrees or so when I did a 50%.
Any suggestions for how to remedy this? I use a python to do the water changes and add the Prime directly to the tank, so I would like to continue doing that method. Plus, I have a 22 month old son, so having large buckets of water and heaters hanging around is not ideal!
Would it be terrible to fill the tank up from the tap using warm water? So that would be softened hot water mixed with unsoftened cold water, right?