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- Mar 9, 2016
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Hi a couple years ago I thought I has my salinity too low so I ordered some calibration fluid from bulkreef. I picked up the hanna hi70024. I used this to calibrate my refractometer. After doing so it said my salinity was real high 41ppt. I decided to lower it to 35ppt. At first everything seemed OK but over the last year my 4 urchins died and my 4 starfish. Now my clams are not doing well. Had a temperature sensor go bad and thought it might be copper so I did an ATI test. No copper but my salinity was 23.63ppt. Before I sent the water sample I measured my salinity at 35ppt and checked my refractometer with the hanna solution and it shows 35ppt. Just rechecked my refractometer and a 2nd unit. Both read the same 35ppt for tank calibration fluid.
I am days away from putting salt in my new 400G tank and want to get this resolved. I have had amazing tanks in the past.
When I check my refractometer calibration with rodi water it reads 10ppt. Which is about how much I'm off by.
All I do to calibrate the refractometer is add the 35ppt solution and adjust the set screw until I get a 35ppt reading.
What am I missing????????????
1 pic of the rodi at 10ppt 2 pics of tank water. 2 of hanna solution.
I am days away from putting salt in my new 400G tank and want to get this resolved. I have had amazing tanks in the past.
When I check my refractometer calibration with rodi water it reads 10ppt. Which is about how much I'm off by.
All I do to calibrate the refractometer is add the 35ppt solution and adjust the set screw until I get a 35ppt reading.
What am I missing????????????
1 pic of the rodi at 10ppt 2 pics of tank water. 2 of hanna solution.