If water is only treated with chlorine,then just let it set for 24 hours before using.
If source water however is treated with chloramines which is combo of chlorine and ammonia as most /many household's are,then you need water conditioner such as PRIME or AMQUEL + to treat new water before using or during re-fill's.
Loads of hobbyist's do it like this.
PRIME is actually pretty cheap over the long haul compared to all other conditioner's.
One ml (almost a drop)treats 10 gal of water and detoxifies chlorine,chloramines,ammonia,nitrites,and heavy metals.
Doubtful that it would be more expensive annually than buying bottled water and provides benefit's for fauna.
If source water however is treated with chloramines which is combo of chlorine and ammonia as most /many household's are,then you need water conditioner such as PRIME or AMQUEL + to treat new water before using or during re-fill's.
Loads of hobbyist's do it like this.
PRIME is actually pretty cheap over the long haul compared to all other conditioner's.
One ml (almost a drop)treats 10 gal of water and detoxifies chlorine,chloramines,ammonia,nitrites,and heavy metals.
Doubtful that it would be more expensive annually than buying bottled water and provides benefit's for fauna.