How often do you calibrate your refractormeter??

[Slyguy00]

Originally Posted by mikellini

My vertex unit is touchy too. I calibrate with a 35ppt solution every time.

I'm with u guys. Pretty simple to keep calibrated so why not? The less fluctuation my tank sees the happier it will be as far as I'm concerned.

[jhj0112]

hmm maybe it's time for me to calibrate mine....

[Myka]

Originally Posted by kamloops_reefer

everytime - I have a vertex one and find that its a pretty touchy instrument. and can fluctuate +/- 0.03

Yeah, I find the Vertex ones are pretty bad for wandering.

[Dearth]

I calibrate my vertex when I think about it which is once every month or so.

[SteveCGY]

Once every two years considering I use it once a month. And always leave it a point high so it compensates for evaporation and never let more than 4l absolute max evaporation. As soon as I can see water under my trim I add and add calcium to rodi water I ad

[kamloops_reefer]

you wouldn't think that a name like 'vertex' would offer a product which sounds more touchy than others?

Perhaps I'm just too rough on precision tools - but if I calibrate mine (I use the solution as well) and then set it down on the table a couple times (about as diligent if it was a glass of water, so not too gentle, not too rough) you might be surprised to find that it will change on you.

I usually have to calibrate the unit twice, first time could have left over residue from previous testing on the glass. Second is a for sure check - and as well as the tank water, check twice or even three times, trying not to set it down or bump it into anything (I usually just dip the entire end of the Ref. into the tank)