Ph Swing

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ss95003

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I got my new Neptune controller all hooked up. So far I love it. It's been running for about 4 days now with temp and Ph.

My questions is when I graph my Ph it looks like I have a swing on average of .33 it goes from a low of about 7.8 at night to a high of 8.17...is this exceptable? I know the high is good, but is the low to low?
 
@ss95003 wrote:
I got my new Neptune controller all hooked up. So far I love it. It's been running for about 4 days now with temp and Ph. My questions is when I graph my Ph it looks like I have a swing on average of .33 it goes from a low of about 7.8 at night to a high of 8.17...is this exceptable? I know the high is good said:
To some that might seem drastic, your PH will always drop at night and depends on load in tank as to how low it may go. I have heard a fuge can help some with an opposite lighting cycle than your main tank, but I have had no experience with this. My tank is usually at 7.6 in the morning and 8.1-8.2 in the late evening just before lights go off. I have great growth on all my sps corals. I also keep my temperature around 76-77
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my temp has been great with the ACII I have keep my tank around 78 with no chiller just fans. I do have a fuge with a light that stays on 24/7 but it just a small HOB so it's probably not making a difference.
 
@ss95003 wrote:
I got my new Neptune controller all hooked up. So far I love it. It's been running for about 4 days now with temp and Ph. My questions is when I graph my Ph it looks like I have a swing on average of .33 it goes from a low of about 7.8 at night to a high of 8.17...is this exceptable? I know the high is good said:
What is your alkalinity?
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9.3 DKH / 3.31 meq.L

my Mag an CA levels are a little low though.
Mag 1200
Ca 360

I will start to raise those 2. My Alk appears to be in a good range correct?
 
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