Alkalinity advice please

[monkeyCmonkeyDo]

I keep my alk 10.7-11.2
Imo if ur doing wcs with matching salinity and lower alk....ur lowering the alk in the tank.
Hths
D

 

[chrisgold]

Randy has a formula on here for making your own calibration liquid. It's worth a look just to be sure.

How do i find this?

 

[chrisgold]

I keep my alk 10.7-11.2
Imo if ur doing wcs with matching salinity and lower alk....ur lowering the alk in the tank.
Hths
D

But it doesnt change when i do a water change . I was presuming at first it would just steadily go down but it hasnt . My past tanks i kept at between 8 - 8.4. And was all going sweet with the same methods and mix so that’s why i am confused

 

[Jekyl]

How do i find this?

@Randy Holmes-Farley

 

[Hydrored]

I highly doubt Pro Reef mixes at 8 DKH, I get 7.10 DKH almost every time at 1.0264 SG as tested with Hanna and a Misco Salinity tester for TM Pro Reef. This tells me your refractometer is off, or testing error for DKH. I found Hanna to consistently test .003 lower than it should and was confirmed with Triton test.


Parameters (approx)

• Alkalinity - 7
• Calcium - 440 ppm
• Magnesium - 1350 ppm

Give the newly mixed water a test

 

[Jekyl]

I have a refractometer with calibration liquid I bought with it and check it every time before use. I've bad to dial it in quite a few times. Better safe than sorry.

 

[chrisgold]

I highly doubt Pro Reef mixes at 8 DKH, I get 7.10 DKH almost every time at 1.0264 SG as tested with Hanna and a Misco Salinity tester. This tells me your refractometer is off, I found Hanna to consistently test .003 lower that it should and was confirmed with Triton test.


Parameters (approx)

• Alkalinity - 7
• Calcium - 440 ppm
• Magnesium - 1350 ppm

Give the newly mixed water a test

Yeah a wasnt talking exact numbers it was about that . It is not off i have just calibrated it again with the hanna liquid and it hasnt changed . I use a fresh sachet every month to be safe

 

[Hydrored]

Yeah a wasnt talking exact numbers it was about that . It is not off i have just calibrated it again with the hanna liquid and it hasnt changed . I use a fresh sachet every month to be safe

So what is the DKH of the newly mixed water and at what salinity?