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My pH is 7.85 and salinity is super high at 1.175!

I just calibrated my prob. is there anything wrong. is it possible for ph to go down and yet salinity is up?

Thanks in advance

My Reefing Mission:-

To manage the waters and lights with efficient resources, disciplined husbandry and prograsive knowledge.

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Hi minireef

yes there is something wrong-

Salinity is measured in ppt(parts per thousand) or Specific Gravity(density)

with 1.175sg you have 218ppt (seawater is 28ppt-35ppt)

*In reference- the Dead Sea has a salinity of 300ppt and only bacteria lives in it.

If your readings are right, you are around 7 times over the range and the tank shouldn't have anything swimming in it.

Something is wrong and i think its the device you use to measure salinity- you can cross reference(double check) with a cheap hydrometer (that gives you at least the range you are in even if it is not accurate)

As to the pH, its a minor issue- check you KH and raise it if need be to KH 8-12.

1)You can dose kalkwasser which will rase you pH,KH and calcium together.

2)Dose a buffer that will raise pH individually.

3)If the tank is small, do a Water Change.

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Thanks for the reply.

Before calibration my sg read 1.012. After Calibration it reads 1.175.

I did a 20lt of water change, and than it read 1.125.

The hydro meter read 1.025 but when I test it with NSW it shows 1.015

So how?

Thanks

My Reefing Mission:-

To manage the waters and lights with efficient resources, disciplined husbandry and prograsive knowledge.

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If the livestocks in the tank show no signs of distress, i would rely more on the hydrometer reading 1.025 for now.

plastic hydrometers are usually calibrated at 25c, so at 28c the actual reading is around +0.003 or +0.004 or more.

(1.015 can be actually 1.018 or 1.019 if you use a ATC refractometer). Using this water it will most probably bring down your SG to 1.023 or 1.022 measured by the hydrometer which is still ok and of no concern.

(Marine parameters of 1.021-1.026 allows you this margin)

The only concern is the probe - maybe re-calibrate it again, the extra 0.100+ reading is way off. If it continues to drift then its a probe problem.

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