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Does PH usually change over time?

G

green54321

Member
I recently added a 50 gal barrel to my setup to store water since there's no sink or faucet in my room.

I PH the whole barrel at once to 6.5, but I've noticed lately that if I check it a couple days later it goes down as low as 6.3.

Is this normal?

If so, I guess it would make sense to ph a little high so it ends up right?
 
OldPhart

OldPhart

Member
Is the water getting much exposure to the air, namely are you running an air pump? I wonder because just CO2 getting dissolved into the water can effect the PH.
 
Phaeton

Phaeton

Speed of Dark
Veteran
Water sitting in a covered tank loses entrained air, including both chlorine and CO2.
Several of my nutrients require aeration, pH checks fresh made versus a few days old can change as much as .3, depending on length of sit time.

Just to be sure, put some air into the stored water and see it the numbers go back up. Easy aeration with a pump sucking from and a hose aimed back to the barrel from several feet away (fluming) for two or three minutes should do it.
 
G

green54321

Member
OldPhart said:
Is the water getting much exposure to the air, namely are you running an air pump? I wonder because just CO2 getting dissolved into the water can effect the PH.
Click to expand...

The barrel is sealed when the lid's on, but there's open space above the water in it.
 
G

green54321

Member
Phaeton said:
Just to be sure, put some air into the stored water and see it the numbers go back up. Easy aeration with a pump sucking from and a hose aimed back to the barrel from several feet away (fluming) for two or three minutes should do it.
Click to expand...

That sounds easier than dicking around with the PH all the time!
Thanks for the suggestion.
 
B

bottomland

Member
green54321 said:
I recently added a 50 gal barrel to my setup to store water since there's no sink or faucet in my room.

I PH the whole barrel at once to 6.5, but I've noticed lately that if I check it a couple days later it goes down as low as 6.3.

Is this normal?

If so, I guess it would make sense to ph a little high so it ends up right?
Click to expand...
Wow, your ph goes down,, i get my water right out of the river at 7 to 7.5, if i ph my water to 6 n come back in a couple days it jump back up into the 7's...i would ph it a few hour before using
 
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