Ph 7.5 and dropping

[Reef man 89]

Is this even possible according to my apex my ph right now is 7.53. My alk is 8.19. I do t understand why it is so low. Does anyone else have this problem?

 

[Oscar Bravo]

I am similar issue. I have 7.3 at nights. I have to keep my windows open. I think my CO2 tank is pushing too much gas into the water.

 

[dwest]

The value looks very inconsistent. Is the probe consistently submerged? Do you have lots of houseguests now?

 

[Reef man 89]

No home guests and my probes are all the way In the water. I don’t understand why is so inconsistent.

 

[lpsouth1978]

Perhaps the probe is the issue. Do you have another way of testing to verify the reading?

 

[piranhaman00]

It’s trending downward , seems suspect.

 

[Reef man 89]

Perhaps the probe is the issue. Do you have another way of testing to verify the reading?

I have an old Hanna Ph pen been haven’t used it for over a year and to be honest never liked it.

 

[lpsouth1978]

I have an old Hanna Ph pen been haven’t used it for over a year and to be honest never liked it.

You don't necessarily have to like it, you just need verification. I would still calibrate it and test with it real quick (assuming it has been stored properly and is not dry). At least this will let you know if the probe is reading properly or not. Even a liquid pH test kit would do the job.

 

[Reef man 89]

I did just open all windows in my house just to see if that will change it. Is it possible that after a co2 scrubber media gets Exhausted That it will have reverse effects.

 

[Reef man 89]

You don't necessarily have to like it, you just need verification. I would still calibrate it and test with it real quick (assuming it has been stored properly and is not dry). At least this will let you know if the probe is reading properly or not. Even a liquid pH test kit would do the job.

So I did just try it out and that read 6.5. I did look for some calibration fluid and couldn’t find any so I will have order some. Hold often should you calibrate the apex ph probe? I just bought the apex new on Black Friday.

 

[dwest]

I get distinct day and night patterns. Yours doesn’t make sense to me. Do you ever see something like this?

 

[kevin_e]

What are typical values or average for your tank. Have you and any inhabitants been home more frequently since it dipped? I found that mine dropped on weekends.

I had to crack two windows, run my skimmer line outside and connected to a co2 scrubber to get pH that now averages 8.2 and ranges from 8.1 to 8.4. Before that, with two people and 3 dogs in my 1200 SF apartment, I was ranging from 7.5 to 7.8, give or take.

 

[kevin_e]

I get distinct day and night patterns. Yours doesn’t make sense to me. Do you ever see something like this?

It does appear he has a typical pattern the last several days on that graph, it just trends downward. But he also said something about a co2 tank, so that may explain some of the irregularities.

 

[Reef man 89]

I get distinct day and night patterns. Yours doesn’t make sense to me. Do you ever see something like this?

No it has never had a consistent up and down like yours it always had a different high point from day to day. The lowest it has ever been for me was 7.7 at night with high any where from 7.8 to 8.2 There has been no change in at my house when it comes to co2. Just me/wife/daughter and one dog. I do live in an apartment.

 

[Larry L]

Is it possible that after a co2 scrubber media gets Exhausted That it will have reverse effects.

Not sure what you mean by reverse effects, but if you are running a CO2 scrubber you will definitely see a downward trend as the media get exhausted.

 

[taricha]

weirdly low pH?
1) calibrate meter, and check a reference of known pH.
if reading persists...
2) figure out why CO2 is skyrocketing.
IMO, Don't worry about 2) until 1) is addressed.