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Old Today, 02:06 PM   #1
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Join Date: May 2018
Posts: 6
DKH help

Hi everyone,

I am considering setting up a automatic dosing system in preparation for buying more corals, I have a 120g tank, running for 10months now. Contains around 10 fish, 5 soft corals and 6 LPS corals.

I've measured my calc, mag & alk for the last 3 days at the same time and it's come out as follows.

Calc - 420 / 420 / 420
Mag - 1260 / 1260 / 1260
DKH - 7 / 6.85 / 6.7

I know my alk is too low but as it's dropping steadily should I start dosing just alk and leave the others to water changes?

I change 15% water every two weeks with red sea salt.

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Old Today, 03:23 PM   #2
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Join Date: Mar 2015
Location: Upstate NY
Posts: 5,035
Perfectly fine to just dose ALK.

80G SCA Build:

Originally posted by der_wille_zur_macht:

"He's just taking his lunch to work"
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Old Today, 06:01 PM   #3
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Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,259
I agree. Dosing just the alkalinity should be okay. I'd watch the calcium level from time to time, and the SG, since the alkalinity supplement will raise it.

Jonathan Bertoni
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