How often do you calibrate your refractormeter??

[jhj0112]

I have used have my refractormeter for nearly a year (10 months) and never thought of calibrating it because it seems to work well..

How do you know it's time to calibrate or how often do you calibrate it??

on google, some says they calibrate every time you use, others say they have not calibrated it for over 2 years..

[Coral Hoarder]

mabie once a year it seems to stay perfect tho

[Slyguy00]

every few water changes i check it.. Once a year scott? really, come on man lol

[Coral Hoarder]

Lmao or when my corals look funny and everything thing elts checks out

[Aquattro]

People calibrate these things?? oh....lol

[jhj0112]

Originally Posted by Aquattro

People calibrate these things?? oh....lol

haha that's what I thought at first.. lol

[Flash]

I don't do many water changes.... But once ever few months! Lol it only takes a second!

[shiftline]

Never.. Every once in a while o check it with RO. Never rally seems to change calibration on me

[Reef Pilot]

I checked mine a few times initially, but it never changed, so have not checked it for at least a year now. Maybe I should...

[Madreefer]

Never....I haven't checked salinity in years.

For those of you who do check, what do you use to calibrate? Here in PG we don't have a source of SW supplies.