How long for pH to get up there?

[arminkropp]

Just added water to my tank yesterday. I'll be adding LR on thursday. I was wondering how long before the pH goes up? Right now I'm sitting at 7.55 7.60.
Will the LR affect the pH?

Thanx

 

[DaveBeaty]

7.6 8O What kind of salt and substrate are you using? 1 hour after I mixed my salt water (Instant Ocean, by the way)and poured in my aragonite sand, I had a ph of 8.2

You can try adding a little sodium bicarbonate if you are doing fish only or even calcium hydroxide solution (kalkwasser) if you are planning on raising corals to raise the ph, but I am really suprised it is that low. The live rock should raise the ph just because of the amount of calcium that is usually in the rock (dead corals or limerock).

 

[quarryshark]

The LR should help buffer the water.
I would just give it some time. How much water movement do you have and do you have a glass cover?

 

[foma2000]

ph is one of those things that should be at the correct range emediatly after you mix it. is your specific gravity correct? do you have a c02 reactor?

 

[arminkropp]

No cO2 reactor. SG is at 1.023. (3 days after water was mixed)
I used instant Ocean Salt and RO water
I have 80Lbs of CaribSea Aragamax sand
Yes I do have a full cover (hood) on my tank. I'll toss that in about 2 weeks when mt PC show up. I know that surface gas exchange can be affected by it being covered.
And as an update today my pH is at 8.05.
Guess you're right QS!
Thanx