Auto Dosing Stability

[Max93]

Hello,

After manually dosing for the last 12 years (topping off manually for 12 years too) I finally invested in both modern solutions to this daily chore.

Now, before installing my auto doser I was manually dosing 12.5ml alk and 10ml CA every day at the same time. My levels would read the same every day or be slightly off by .5 or 10. I was getting 8.5 alk and 450 calcium every day for two weeks after testing at the same time.

So my tank was consuming about 1.0 in alk a day. After testing without dosing for 24 hours, and testing again. I use Salifert test kits.

Tank:

25 gallon
Mixed reef, mostly LPS and a few zoas.

Now I have my auto doser dosing 12ml a day for both calcium and alk for the last 3 days. I dose each every other hour, 1ml. So alk 1pm cal 2pm. So an hour apart for each.

First two days test results:

Alk 8.0
Ca 420

Alk 8.3
Ca 400

And then I tested this morning instead of at night expecting similar numbers and:

Alk 9.3
Ca 440

Can you help me troubleshoot this? I'm not understanding.

 

[Lonely reefer's]

I would measure how much it actually come out
For example if you dosing 10ml per day for 10 times

For example started at 8am
The measurement would be 1ml each time the dosingsing pump come on
If 5 time per day the measurements would be 2ml
Did you calibration the dosingsing pump

 

[Max93]

Hello,

Thank you for your response. I am dosing it over 24 hours. So 12x at 1ml throughout 24 hours.

Yeah i calibrated each motor to 100ml using a graduated cylinder.

So alk and cal dose every 2 hours. For example:

1am calcium 1ml
3am calcium 1ml

2am alk 1ml
4am alk 1ml

For a total of 12ml over 24 hours.