Hannah alk calc checker defective?

[ChrisB]

My hanna calc checker is showing my calc at 600 , I used it on fresh made water at 1026 and it reads 600. The salt I am using is tropic marin bio active. If i make water with a low sality(1020) should the calc read lower?

 

[ecvernon]

It is your ro/di water. It has to be pure h20. Any little trace of calcium will make results read high. I over came that problem by getting my water DIRECTLY from the last stage coming out of my DI Resin.
When I collected the water from my rodi reservoir I always got that error.

 

[ecvernon]

Just for clarification I am talking about the part that calls for h20 to dilute the sample on the test vial

 

[ChrisB]

I think you are right because the last stage of my rodi is a tower full of crused coral , i am going to remove it. I got the unit many years ago from mtc. It was called an arogonite reactor.
http://i1001.photobucket.com/albums/af135/liquid35/2012-08-17_09-02-22_706.jpg

 

[ChrisB]

Took off the tower of crush coral , took water sample right out of the di and i still got reading of 600 . I also did an alk test and got a reading of 7.59dhk.
driving me nuts.

 

[NewfiDog]

There was alot of bad reviews on the hanna calc checker, i read they were working on a second one dont know if it is out or its what you have but i would get another kit.

 

[ChrisB]

Hanna tech wrote back to me.
This meter is using a 100 to 1 dilution so you must be very precise in adding everything just one extra or less drops will have an impact on the results.
what kit do you guys use?

 

[ChrisB]

ok got it , I was very carefull this time. Hanna tech sent me word doc with pics . I got a reading of 480

 

[3450500]

can you send me the info that hanna sent you as I am getting very high cal reading also. I will pm you my email

 

[ecvernon]

http://web1.reefcentral.com/forums/showthread.php?t=2082216

just found this today. looks helpful.
i was getting consistent results when i switched to an insulin syringe. the syringes they provide suck

 

[ChrisB]

http://www.youtube.com/watch?v=LGjpicL6hTk