Low ph

[Zos4me]

I just got back my Neptune after sending out for repairs.whole different nightmare.anyway my ph is down to 5.6.i have been doing water changes once a week around 10 gals or so on a 40 gal breeder with 26 trigger sump. Other than fresh air how can I bring this up
Thanks

 

[Daddy-o]

Fresh air to the skimmer and forget about PH.
Cheers! Mark

 

[vessxpress1]

Doesn't seem possible. Sounds more like a bad pH probe. They recommend replacing them every year. If they aren't maintained and calibrated regularly they're unusable.

 

[W1ngz]

Calcium reactors, that dissolve coral and rock, work at levels around the low to mid 6s.
At 5.6 things in your tank would be long past dead and dissolving. Recalibrate the probe.

 

[Randy Holmes-Farley Verified Community Expert]

Agree, it is test error. pH is never below 7.0 or so in a reef tank.