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- Oct 9, 2019
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I have read through a few kinda similar threads, but most were older.
Need some help folks. I have the Hanna HI98319, and this is where I’m at.
I swapped over to the Hannah about 4 months ago. I calibrate it monthly with the Hannah satchets and it always calibrated flawlessly.
I test weekly with The Hanna HI98319. I test my DT water and mix water for a water change to the same specific gravity. I am ALWAYS @ 1.026 per the Hanna.
The other day I brought a sample of my water up to a reputable LFS To compare my measurements of all parameters. Everything was pretty similar but I was at awe to see they were measuring my salinity at 1.030 specific gravity using a refractometer. (LFS said they calibrate their refractometer with RODI every morning.)
I went home and pulled out my two old Refractometers, cleaned them and calibrated them with RODI as I was out of calibration fluid.
Upon testing my water I measured 1.030 on one refractometer and 1.029 on the other.
I hastily started heating fresh RODI and was going to start bringing down my salinity, but after taking a deep breath held off.
I called Hanna the next morning and spoke with a tech. He stated that results of the Hanna “conductivity” tester could not be compared with the refractometer because they were different in how they measured. He insisted Hannas was more accurate (which I would expect) and that as long as I was able to calibrate the Hanna HI98319 Without any issues I should trust the more accurate conductive reading than the other 3 refractometer readings.
Now I don’t know what my best course of action is. After reading through a bunch of threads on R2R everyone has discrepancy’s but mine seems dangerously larger than the others. On that note I have a large mixed reef of softies, LPS, & SPS as well as an abundance of fish & Shrimp and everything seems great and all colors and growth are amazing.
Any suggestions on how to proceed? I want to think this one through prior to making any rash decisions.
Need some help folks. I have the Hanna HI98319, and this is where I’m at.
I swapped over to the Hannah about 4 months ago. I calibrate it monthly with the Hannah satchets and it always calibrated flawlessly.
I test weekly with The Hanna HI98319. I test my DT water and mix water for a water change to the same specific gravity. I am ALWAYS @ 1.026 per the Hanna.
The other day I brought a sample of my water up to a reputable LFS To compare my measurements of all parameters. Everything was pretty similar but I was at awe to see they were measuring my salinity at 1.030 specific gravity using a refractometer. (LFS said they calibrate their refractometer with RODI every morning.)
I went home and pulled out my two old Refractometers, cleaned them and calibrated them with RODI as I was out of calibration fluid.
Upon testing my water I measured 1.030 on one refractometer and 1.029 on the other.
I hastily started heating fresh RODI and was going to start bringing down my salinity, but after taking a deep breath held off.
I called Hanna the next morning and spoke with a tech. He stated that results of the Hanna “conductivity” tester could not be compared with the refractometer because they were different in how they measured. He insisted Hannas was more accurate (which I would expect) and that as long as I was able to calibrate the Hanna HI98319 Without any issues I should trust the more accurate conductive reading than the other 3 refractometer readings.
Now I don’t know what my best course of action is. After reading through a bunch of threads on R2R everyone has discrepancy’s but mine seems dangerously larger than the others. On that note I have a large mixed reef of softies, LPS, & SPS as well as an abundance of fish & Shrimp and everything seems great and all colors and growth are amazing.
Any suggestions on how to proceed? I want to think this one through prior to making any rash decisions.