For leaving water out to sit, I've heard from fish owners that you have to be careful that it is a chlorine system and not chloramine which doesn't so simply ev

For leaving water out to sit, I've heard from fish owners that you have to be careful that it is a chlorine system and not chloramine which doesn't so simply evaporate out: https://www.epa.gov/dwreginfo/chloramines-drinking-water https://www.epa.gov/dwreginfo/chloramines-drinking-water