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Ph balancing

Savery

NJRC Member
I hope this is the right thread for this. My pH is trending up slightly more and more each day(8.4ish peak). I recently replaced my co2 reactor media but left it disconnected from the skimmer to allow it do go back down naturally. But it really hasn't, still a slight trend upwards each day. Skimmer still basically 24/7 unless I'm adding phyto(off for hour) or feeding(only off 5 minutes). Im concerned next week at the current rate I'll be over 8.5 which is borderline too high right?

I've recently added a few more corals to the tank, so I'm slowly adjusting the dosing im doing to account for the new consumption of nutrients. Currently dosing around 6ml of alk, 4ml of cal and 8ml of mag all red sea foundation daily

Pictures of parameters and pH trends attached. Any advice is appreciated. Also going to manually test with some hannas to compare to my tridents which have been pretty accurate since replacement
 

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The Gooch

NJRC Member
First thing I would do is calibrate the ph probe. If your PH is actually going to 8.5 that’s great. Means you have low co2 in your home and great buffering. I dose primarily Kalkwasser on my systems and I routinely hit 8.5 with no issues. I have the shutoff at 8.65 which I’ve hit with no issues. Some guys hit 8.7-8.8 with extreme kalk dosing and report no issue. I think you’re likely trending up with the cooler weather and open windows resulting in lower co2. I don’t think you will trend much higher unless you start dosing kalk lol.
 

Savery

NJRC Member
I did some kalk in my biocube when i just beginning so I have some on hand. My tank is in the basement and I'm the only one that goes in really and that's to admire the tsnk, clean the tank, sometime cuss at it. And to play CoD in the evenings. So not much Co2 in there. That's why I havent used the co2 reactor the last week since I changed the media. My pH has always been above 8 since adding the reactor after switching into this 75 gal and added that reactor. I have a small window just to the left of the tsnk that the co2 reactor intake line sticks out of. My first thought was just kee the reactor off for a week or two to see if I drop back down to the 8.0 low and 8.3 high instead of 8.3-8.5.

Ive got some neptune calibration solution but not for ph. I may have some calibration packets for ph somewhere
 

Savery

NJRC Member
Yeah definitely meant pebbles not peddles lol. Can't remember if it was Top shelf page or Jersey Corals where I've been snagging auction frags on the cheap.
 

Savery

NJRC Member
First thing I would do is calibrate the ph probe. If your PH is actually going to 8.5 that’s great. Means you have low co2 in your home and great buffering. I dose primarily Kalkwasser on my systems and I routinely hit 8.5 with no issues. I have the shutoff at 8.65 which I’ve hit with no issues. Some guys hit 8.7-8.8 with extreme kalk dosing and report no issue. I think you’re likely trending up with the cooler weather and open windows resulting in lower co2. I don’t think you will trend much higher unless you start dosing kalk lol.
I snapped the week prior. Steady up and down with the light schedule
 

The Gooch

NJRC Member
Looks good to me. PH will climb the highest during the photoperiod. You don’t have anything to be concerned about. You should buy a bunch of packs of ph solution and calibrate your probe regularly (float in tank water to match temp). Probes usually fail after a year or 2 IME. Once in a while you’ll get a long lasting one lol.
 

Savery

NJRC Member
Looks good to me. PH will climb the highest during the photoperiod. You don’t have anything to be concerned about. You should buy a bunch of packs of ph solution and calibrate your probe regularly (float in tank water to match temp). Probes usually fail after a year or 2 IME. Once in a while you’ll get a long lasting one lol.
Ive got a few bottles of neptune calibration solution from reagents boxes. Going to research if itll.work or not for the ph probe
 

Savery

NJRC Member
I should have a box of the packets of calibration solution for it. I remember buying a box of them. Where they went, different story
 

DEL

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Here's is a pic of how much mine fluctuates. Dont stress it. Screenshot_20250914_161615_APEXFusion.jpg
 
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