Instant ocean hydrometer vs refractometers

[pringles]

Which one should I use now, I just switched the instant ocean hydrometer to the refractometer from BRS , the salinity is so different with the instant ocean was 1.025 but with the hydrometer is 1.022 ( same water .)

 

[EricTheRed]

did you calibrate the refractometer?

 

[pringles]

I did with calibration fluid which come with

 

[Chitownreefs]

Check to be sure the hydrometer reads zero with RO water without salt

 

[trackfast]

Use the refractometer. It doesn't have any moving parts and a calibrated one is more accurate.

 

[Reefwise]

Vinnie

New hydrometers are prone to give false high readings. Old hydrometers are prone to give false low readings.

Properly calibrated seawater refractometers are accurate within 2% meaning your specific gravity could be anywhere from 1.020 to 1.024. Accuracy is dependent on magnesium levels. Refractometers are most accurate at 1280ppm.

For use in measuring reef aquarium water you should always use a refractometer meant for seawater like BRS's and calibrate with the solution given never RO water.


Sent from my iPhone using Tapatalk

 

[labas39]

I recall a couple years ago when I used a hydrometer. I went Reefwise and Brian tested my water with his refractometer. Iwas way off. Get a refractometer. It's even faster to tested, less false measurements.

 

[Pfisherman]

I think that as long as you pick one and stick to it everything will be all good
Sent from my RM-917_nam_usa_100 using Tapatalk

 

[maidia]

I use this
http://www.aliexpress.com/item/Waterproof-Pen-type-Digital-Salinity-Meter-with-Multiple-Calibration-Points-0-70ppt-AUTO-MANUAL-Ranging-1/657063785.html

also this
http://www.bulkreefsupply.com/refractometer-for-reading-salinity-with-calibration-fluid-1.html

Both read perfect match..the number..
I love the first one, really easy for me just stick it into the water then see the number.

 

[trackfast]

I use this
http://www.aliexpress.com/item/Waterproof-Pen-type-Digital-Salinity-Meter-with-Multiple-Calibration-Points-0-70ppt-AUTO-MANUAL-Ranging-1/657063785.html

also this
http://www.bulkreefsupply.com/refractometer-for-reading-salinity-with-calibration-fluid-1.html

Both read perfect match..the number..
I love the first one, really easy for me just stick it into the water then see the number.

That's sweet! No pippettes!I think I just found my present to myself.