Water changes and water containers

[Acronuts]

Hey guys I have what may seem to be a few questions and unproven theory about water changes and the containers.
You buy mixed water from an extremely reputable LFS. You have your own gallon jugs with lids. You can't do the WC for several ( 4 to 5 )days.
With containers being closed with no air coming in or out, how fast will the water deteriorate?
How low will oxygen levels be since there is no circulation?
Will Alk drop?
Will Ph drop?
Should this mixed salt water be used?
Is there a way to save it?
Juan

 

[Troylee]

Mine sits a big container in the garage with the top open for months at a time.... Unless your changing more than 50 percent of your water I wouldn't worry the o2 levels... Randy Holmes had a article and said it could be stored for a very long time...