Salt lowering ph?

[kilnakorr]

New to saltwater tank, but this doesn't make sense to me.
I filled my tank with ro water, and ph was around 7.2 afterwards.
I started adding some salt a few hrs ago, and ph is lowly dropping. Currently around 6.5.
I was expecting it to rise?

Anyone can explain this?

 

[James M]

Are you cycling your tank ?

 

[kilnakorr]

Are you cycling your tank ?

Well, the tank hasn't really started much cycling yet. Just added water today and so far about 1/3 of the salt needed. Nothing else except dry rock and sand.
The ph started dropping right after the first pound of salt was added.

 

[James M]

Well, the tank hasn't really started much cycling yet. Just added water today and so far about 1/3 of the salt needed. Nothing else except dry rock and sand.
The ph started dropping right after the first pound of salt was added.

I would not be worried about the ph at this moment.

 

[kilnakorr]

I would not be worried about the ph at this moment.

I'm not worried, but curious XD

 

[GoVols]

I'm not worried, but curious XD

Test your ph in 24 hours so the tank has time to get aerated.

In the long haul:
There are two factors that determines your ph, your alkalinity, and how much C02 is trapped in your water.

 

[kilnakorr]

Test your ph in 24 hours so the tank has time to get aerated.

In the long haul:
There are two factors that determines your ph, your alkalinity, and how much C02 is trapped in your water.

Yes. I did figure out the 'error'. I must have used wrong buffer for my calibration. I recalibrated, and ph is close to 8. After adding more salt (in sump not far from the probes) it got to 8.1 and slowly decreased as the salt dissolved.
I still got around 10 lbs of salt to add, so guess ph will end at reasonable levels.

Now to figure out why my temp probe seems to read to low