Confused berween 2 salinity meter checker

[Romadov]

Hello guys, i have this 2 tools salinity meters, 1 digital and 1 manual measurement. So i checked my tank using the digital and it shows 1.023, then i cheked using fluval manual measurement and it shows 1.028, which one should i believe? Im scared my fish/coral would die because the wrong tool that i used. Thankyou

 

[maleks.reef]

I cannot tell you which one is more accurate because I have not tried either, however, generally speaking, the digital ones should be more accurate, assuming they are of good quality. I highly suggest you get a hanna salinity checker. It is incredibly easy to use and accurate.

 

[Randy Holmes-Farley Verified Community Expert]

Fish and coral will not typically die at either specific gravity just due to the specific gravity.

But as noted, no one can tell you which (if either) is more accurate without testing or calibrating the devices.

This shows how:

Reef Aquarium Salinity: Homemade Calibration Standards by Randy Holmes-Farley - Reefkeeping.com

 

[maleks.reef]

Fish and coral will not typically die at either specific gravity just due to the specific gravity.

Can you please explain what you meant by this?

 

[Pistondog]

Can you please explain what you meant by this?

I think he means that fish and corals can live in water that is at either 1.023 or 1.028 sg.

 

[Randy Holmes-Farley Verified Community Expert]

Yes. So assuming the real value is either one or in between, I do not think fish will die because of the specific gravity.

That said, they may die for other reasons, or live a long and happy life.

 

[maleks.reef]

I think he means that fish and corals can live in water that is at either 1.023 or 1.028 sg.

That makes sense. Thanks .

 

[38bill]

Try soaking the mechanical one in some vinegar and then check it again.

 

[Pistondog]

Hello guys, i have this 2 tools salinity meters, 1 digital and 1 manual measurement. So i checked my tank using the digital and it shows 1.023, then i cheked using fluval manual measurement and it shows 1.028, which one should i believe? Im scared my fish/coral would die because the wrong tool that i used. Thankyou

You might gain some insight by measuring rodi with each tool. Rodi should read 1.000 sg.
Tap the mechanical hydrometer to remove any air bubbles.

 

[Romadov]

I cannot tell you which one is more accurate because I have not tried either, however, generally speaking, the digital ones should be more accurate, assuming they are of good quality. I highly suggest you get a hanna salinity checker. It is incredibly easy to use and accurate.

Im using cheap digital checker, its only 15$ thats why i dont know which tools to trust

 

[Romadov]

Fish and coral will not typically die at either specific gravity just due to the specific gravity.

But as noted, no one can tell you which (if either) is more accurate without testing or calibrating the devices.

This shows how:

Reef Aquarium Salinity: Homemade Calibration Standards by Randy Holmes-Farley - Reefkeeping.com

Thanks for the info! I think id better use manual measurement

 

[Romadov]

Try soaking the mechanical one in some vinegar and then check it again.

Ill try when i get home, thanks!

 

[Romadov]

You might gain some insight by measuring rodi with each tool. Rodi should read 1.000 sg.
Tap the mechanical hydrometer to remove any air bubbles.

Thanks! Ill try it when i get home

 

[Randy Holmes-Farley Verified Community Expert]

Better is to make a 35 ppt standard solution to check each one. Those two devices need different solutions.

Reef Aquarium Salinity: Homemade Calibration Standards by Randy Holmes-Farley - Reefkeeping.com