Jonas Bergkvist
Active Member
Yesterday i did a partial water change and today i measured the salinity. To my surprise it showed SG 1.030. I thought it must be wrong so i re-calibrated it with .35 PPT solution and tried again. My water turns out to be also .35, which i'm fine with.
It has happened three times that the refractometer was way off just like this. I have had it for like 8 months to measure my water.
For this test i used a brand new pipet for the aquarium water. My refractometer is stored in normal room temperature, and there was no delay in measuring. I also re-calibrated it using a new pipet.
I always clean the refractometer after each use.
Is it normal to have such way-off-readings after only 8 months? I dunno how many times i have used it, but a guess would be less than 40 times.
Do you think three times failure in this period is reason enough to send it back and call it faulty? Because i find this whole thing annoying :) It's a Red Sea refractometer which costed just over EUR 70.
Thanks for your input!
It has happened three times that the refractometer was way off just like this. I have had it for like 8 months to measure my water.
For this test i used a brand new pipet for the aquarium water. My refractometer is stored in normal room temperature, and there was no delay in measuring. I also re-calibrated it using a new pipet.
I always clean the refractometer after each use.
Is it normal to have such way-off-readings after only 8 months? I dunno how many times i have used it, but a guess would be less than 40 times.
Do you think three times failure in this period is reason enough to send it back and call it faulty? Because i find this whole thing annoying :) It's a Red Sea refractometer which costed just over EUR 70.
Thanks for your input!
