Weird results with Red Sea Pro test kit

[elic173]

I'm also having odd results with the Red Sea test kit for alk. Mine is reading 14. I've written to Red Sea. My calcium and magnesium are fine.

 

[Baseball#27]

That may very well be your problem. I found there was a large difference when calibrating to 0 compared to 35ppt. I realise the manufacturer recommends calibrating to 0. With instruments they are usually calibrated in the range you are testing in. A small difference at 0 would be multiplied greatly further up the scale.

I got some accurasea on Amazon. Relatively cheap and should last you pretty much forever

Wait so do I still use RODI water and set it to 35ppt?

 

[Baseball#27]

I'm also having odd results with the Red Sea test kit for alk. Mine is reading 14. I've written to Red Sea. My calcium and magnesium are fine.

Did you get a response from them?

 

[elic173]

They have a base test reagent which tests the KH test kite. I've asked them to send it to me, so I can test

 

[OhDumb]

Have you checked the expiration date on the boxes?

 

[GoPitt88]

Wait so do I still use RODI water and set it to 35ppt?

No....you need to get a calibration fluid that is 35ppt.

https://www.bulkreefsupply.com/aqua-craft-refractometer-calibration-fluid.html

 

[Baseball#27]

Have you checked the expiration date on the boxes?

I Think I found it on the bottom of the box on the left corner. It says exp. 02/20, so I would assume that it expires in 2020 right?

 

[OhDumb]

I Think I found it on the bottom of the box on the left corner. It says exp. 02/20, so I would assume that it expires in 2020 right?

Yes, you're good!

 

[Bayareareefer18]

Wait so do I still use RODI water and set it to 35ppt?

I got a bottle of accurasea from Amazon. Just drop it onto your refracto and turn the screw so it reads 35 ppt