Strange PH Readings

[surf_buddy]

Today I noticed my PH was reallly low, 7.14 down from 8.11 the previous day. I have a PH probe close to a corner of my sump, and I decided to take a reading from the effulent out of my CA reactor. It was 6.7, so I was wondering how the PH was reading 7.14. The probe is always in this location, and it's the first time I've seen it so low. I decided to move the probe to another location, and it read a PH of 8.07. My CA is 425, my MAG is 1550, salinity is 1.025, and my alk is 11dkh. Any idea about what might be going on here?

I decided to bump up the PH earlier, just to be safe, and right now it's reading 8.20. Normally my PH holds around 8.15.

 

[g0rFz]

maybe too much calcium was released thats really the only possible way unless your probe is dying?

 

[DonW]

:

I decided to bump up the PH earlier, just to be safe, and right now it's reading 8.20. Normally my PH holds around 8.15.

Im sure it was just a bad reading but when you say "bump up" ph do you mean in the tank?

Don

 

[surf_buddy]

Im sure it was just a bad reading but when you say "bump up" ph do you mean in the tank?

Don

Yes I added a little buffer yesterday to bring the ph closer to 8.3. After I moved the probe the ph is reading 8.15 this morning in the tank, and 6.6 from the reactor effulent. I'm thinking it was a bad reading, and hoping the probe isn't dying... it's only 6 months old.

 

[DonW]

Yes I added a little buffer yesterday to bring the ph closer to 8.3. After I moved the probe the ph is reading 8.15 this morning in the tank, and 6.6 from the reactor effulent. I'm thinking it was a bad reading, and hoping the probe isn't dying... it's only 6 months old.

Be careful with buffers, most will raise your alk.

Don