Ph decreasing while dosing Magnesium and calcium?

Magostini

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Hey all, I would like to ask your support here.
I have a 100 gal system for 50 days. Cycling complete:
Nh4 0
Nh3 0.001
Nitrite 0
Nitrate 8 ppm
Phosphate 0.07 ppm
Ph was 8.27 about one week ago with a co2 scrubber.

But after following very closely the indicators above I tested the following:
MG 1100
CA 350
8dkh
So I started to dose MG red sea (35 ml), CA (35 ml) red sea on a daily basis since then. Occasionally I noticed alkalinity at 7 dkh. So I added brightwell alkalyn 8.3.
The thing is MG is now almost there 1290, calcium at 450, alkalinity stable at 8dkh even dosing buffer.
But ph is slowly decreasing from 8.27 to 8.17 now.
Any idea on what's happening and what are the possible correlations here? Any idea on what I should do too?
Thank you!
 

dank reefer

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Como este é um tanque novo, eu aconselho você a não perseguir o PH. Deixe seu tanque estabilizar por alguns meses e veja onde seu PH está.

Happy Reefing

Since this is a new tank, I would advise you not to chase PH. Let your tank stable out for a few months and see where your PH is by then.

Happy Reefing
 

Fennel

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Hey all, I would like to ask your support here.
I have a 100 gal system for 50 days. Cycling complete:
Nh4 0
Nh3 0.001
Nitrite 0
Nitrate 8 ppm
Phosphate 0.07 ppm
Ph was 8.27 about one week ago with a co2 scrubber.

But after following very closely the indicators above I tested the following:
MG 1100
CA 350
8dkh
So I started to dose MG red sea (35 ml), CA (35 ml) red sea on a daily basis since then. Occasionally I noticed alkalinity at 7 dkh. So I added brightwell alkalyn 8.3.
The thing is MG is now almost there 1290, calcium at 450, alkalinity stable at 8dkh even dosing buffer.
But ph is slowly decreasing from 8.27 to 8.17 now.
Any idea on what's happening and what are the possible correlations here? Any idea on what I should do too?
Thank you!
None, no idea. I assume nitrification bacteria is feeding on something giving you a swing.. idk. Or you forgot soda ash.
 
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