Salinity

[Brandonsegula]

 

[Mr. Bill]

When did you last calibrate the refractometer, and did you use RO/DI water or 35ppt calibration fluid? Refractometers have a very short accuracy range and must be calibrated at or near the target. Either way, I would get confirmation before changing anything. 1.023 is not that far off... it's not going to kill anything in the next few days if that is the correct reading.

 

[Brandonsegula]

When did you last calibrate the refractometer, and did you use RO/DI water or 35ppt calibration fluid? Refractometers have a very short accuracy range and must be calibrated at or near the target. Either way, I would get confirmation before changing anything. 1.023 is not that far off... it's not going to kill anything in the next few days if that is the correct reading.

It's probably been this way since Monday when I did the water change. I'll hold off till Tuesday when the lfs opens up so I can double check.

 

[Mr. Bill]

It's probably been this way since Monday when I did the water change. I'll hold off till Tuesday when the lfs opens up so I can double check.

Just be sure to raise it slowly. Topping off every day with sw instead of ro/di until you reach your mark is the safest.

 

[Brandonsegula]

Will do. I haven't seen any difference in the corals behavior. Will they be okay?

 

[Mr. Bill]

Yes. Again, 1.023 is not that extreme. It would take a few weeks to see any distress.

 

[Brandonsegula]

Yes. Again, 1.023 is not that extreme. It would take a few weeks to see any distress.

Okay I'll double check with my lfs Tuesday. Thank you for your help

 

[Brandonsegula]

Yes. Again, 1.023 is not that extreme. It would take a few weeks to see any distress.

Just wanted to inform you that indeed the refractometer was off. My lfs has a nice digital salinity checker my salinity was at 1.0248

 

[islandbreeze]

Since i was kinda in the process, figured id post couple pics what u might wanna do to recondition ur probes. did u know that the classic probes both reg and lab grade are same probe. just any probe that falls outside their testing percent of error my dad the wiz engineer told me. doesnt matter cause u recalibrate them anyway and for our application its not that crucial more apt is calibration lost greater error. anyway, i got like 7 probes on different breeders and they can get out of whack easy. dont scratch them but with credit card or something ( i use a iphone pry tool its like a small plastic flathead) and scrape any growth tube worms etc if any. then i toothbrush them in water, then soak in this hanna ph and orp probe cleaner for an hr. then leave em in storage solution overnight or few hrs. then calibrate ph or other probe , i know prob overkill but they are accurate, i know cause i check them against each other .01 recallibrate couple times if needed. can you callibrate salinity probe? i dont use them. then just

a good soaking in probe cleaner may help.

 

[islandbreeze]