My husband and I just installed a home water softener system (which we're thrilled about) but I've been told not to use softened water for my aquariums. When I expressed my concern to the installation technician he made sure to leave us a spigot outside that produces only hard water (also for lawn care). The only concern I now have is getting the hard water to 79-80 degrees for water changes. What I've done in the past is just use the faucet dial and take the temp on the stream until it was 79-80, then fill up the buckets. Now there is no temp control on the outside spigot, how to I ensure that the water is the same temp as the tanks I'll be adding to? Do I heat it on the stove? Should I buy another heater and just heat the water when it's time for a change? Won't that take longer? I have so many questions, lol. Any advice is appreciated.