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robinscp

A warning about hydrometers.

40 posts in this topic

salifert refracto - check :)

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I have just ordered a bottle only out of interest just to see what if any difference there is

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calibrate with this stuff then check against ro

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Fauna Marin multi reference solution.

 

Good for calibrating refractometers and testing the accuracy of your test kits

 

Sent from my Samsung Galaxy S6 using Tapatalk

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Finally received my calibration solution and checked it with the fluid and then again with normal RO water.

 

Theres no noticable difference between the two but I always thought that the water to be tested from the tank had to be at 20 degrees to give an accurate reading. However having read an article on salt water it states that the refractometer has to be at a temp of 20 and NOT the test sample..

 

Didnt know that.

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Finally received my calibration solution and checked it with the fluid and then again with normal RO water.

 

Theres no noticable difference between the two but I always thought that the water to be tested from the tank had to be at 20 degrees to give an accurate reading. However having read an article on salt water it states that the refractometer has to be at a temp of 20 and NOT the test sample..

 

Didnt know that.

Only if it's a ATC refractometer.

Put water on the slide leave for 30 seconds for the water to acclimate then do your reading.

Glad to hear there is no noticeable difference

 

Sent from my SM-G920F using Tapatalk

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I calibrate with plain RO with the refracto at room temp. Never had any issues.

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i have always calaibrated with ro

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I've always calibrated with 0 TDS RO also got mine double checked at LFS and spot on matched there's.

 

I do check it with RO once a month and it lives in its case beside my tank so always at room temp and I rinse of with RO after use.

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