R.o. Water - How Long Is Too Long

[boxman]

I get RO water from one of my local LFS' bi-weekly and do a 1/4 water change (using 2/3 RO and 1/3 tap water with dechlorinator).

My question is, once I've collected the water from the LFS, how long can I leave it in the sealed container (5gal - UK) before the water is no good (assuming this being unoxyginated etc..)

Thanks

 

[modernhamlet]

I get RO water from one of my local LFS' bi-weekly and do a 1/4 water change (using 2/3 RO and 1/3 tap water with dechlorinator).

My question is, once I've collected the water from the LFS, how long can I leave it in the sealed container (5gal - UK) before the water is no good (assuming this being unoxyginated etc..)

Thanks

Indefinitely I would think. You have almost pure, unadulterated H2O so it can't go bad. While it will lose oxygenation just sitting around, the act of putting it into the tank should reoxygenate it with no adverse effects.

 

[yvez9]

besides, if the container is sealed, the oxygen will stay as it has nowhere else to go.