Alk spike

[reefrider777]

my alkalinity has been pretty steady around 8.2-8.4 and this morning when I tested it was 10. I use a Hanna checker. I retested with a salifert kit and it also registered 10. My Ca is 450. I dose 2 part. Should I unplug the doser and allow the Alk to fall? What could cause the Alk to increase by almost 2 over 24hrs when the dosage never changed. Thanks for the help.

 

[Palyzoa]

Doser malfunction possibly. What dosing pump are you using?

 

[reefrider777]

BRS...I have checked them this morning and the calibration is the same

 

[slayerhellfire]

I would unplug the doses till it drops someimes it just takes a but to get it dialed in, I had the same issue I went from dosing 16ml yeah not alot it' all zoa tank anyways I ended up dialing it in at 7ml and it stays stable

 

[saltyfilmfolks]

You could also drop the dose amount on one dosing time. If not two.
It’ll help narrow down the correct amount.

 

[Greenstreet.1]

What are you using to control your dosing pump ? You may want to make sure that that did not malfunction.

 

[Randy Holmes-Farley Verified Community Expert]

Aside from dosing more, maybe something is bothering corals and reducing demand.

 

[reefrider777]

So I just tested again at my normal testing time and Alk was back to 8.3. I have no idea? I tested with two different test kits, Hanna and salifert. #scratchingmyhead