Low pH solution not yet discussed!

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P-Dub

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A lot of folks seem to have to deal with relatively low pH in our reef tanks. There are many solutions to this problem and I have employed them all. What hasn't yet been discussed is a solution that seems obvious yet, after scouring this and other forums and the net and YouTube has yet been explored. Patience, the final piece of the puzzle is coming. Be advised this will not work for everyone due to tank location.

My journey began with consistently low pH, relatively speaking. i.e. not in the ideal range of 8.2-8.4 we are all looking for. The first photo is my tank soon after being set up and after the cycling.
screencapture-apexfusion-pH.5-29 - 6-5.png

Here we can see the pH averaging around 7.95. This prompted me to open the windows and start running a small co2 scrubber canister on the intake of my protein skimmer. This yielded an improvement but not in the range I was hoping for. Additionally, opening the windows in our location is not ideal as we average daily temperatures of 89*F with relative humidity around 80-90%.
screencapture-apexfusion-apex-pH.6-24 - 7-1.png

We can see this helped but not in the range I was hoping for. Still, I ran with it in this configuration and started to run a full-sized co2 scrubber on the intake of the skimmer. After some time I realized this option was going to start to cost quite a bit of money in scrubber media. I was assuming the scrubber would last longer than 3-4 days. Not checking the color change yielded fluctuations in pH out of the ideal range. So, at that point, I realized it is time to put a hole in the wall and run outside air to my skimmer and save some money. We have a 5-year-old home that is relatively airtight so this was going to have to be my solution.
screencapture-apexfusion-apex-pH7-10 - 7-17.png

So now we are hovering around 8.1 on average. Not bad but still not in the range I would like. So what to do next. Well, it would seem I'd have to live with this and for many it is fine. I could find no other reasonable solution out there on the web. Looking over my system and asking how else can I limit the introduction of co2 into my system when it hit me and I came to the obvious solution. I have an air intake line attached to the, wait for it...... OVERFLOW! Well, I'll be a monkey's uncle... You all can see where this is going form here. But, before I drilled another hole in my 8-inch thick concrete wall I wanted to make certain I was going to see some results. I had the co2 canister laying around, now un-used, so let's see how this might pan out.
screencapture-apexfusion-apex-pH.7-16 - 7-23.png

Now that's better. Averaging 8.2. Now time to drill. Had to go to a larger diameter air intake on my overflow, but
screencapture-apexfusion-apex-pH.7-20 - 7-27.png

So there you have it. Within the range and not spending a small fortune on co2 scrubber media. I'd like it higher but I'll take that. No window opening, no co2 scrubber, just the cost of a 10-inch masonry drill bit.
I hope that this helps others out as well.
Happy reefing.
 
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Hmmm... that’s really interesting! What style drain is this hooked to? A durso?
 
It is a Stockman standpipe. I have room in my overflow for only the one standpipe. This method will work for anyone who has a vented main standpipe such as a Durso.
Just for clarification.
I have a 125-gallon set-up that completed its cycle on the 29th of May. 30-gallon sump, 15-gallon external refugium running a reverse light cycle, 0 Nitrates, 0 phosphates (trying to raise these a little) Ca at 480, dKH 10.2, Mag, at 1340.
 
I think you’re onto something very cool. I haven’t heard of anyone doing that. :)
 
Neither have I. It just hit me. It was one of those duh moments. The overflow and airline that I have now plumbed to the exterior...
DSCN2656.JPG
DSCN2657.JPG
DSCN2658.JPG
 
When I did my wireing for the tank I ran a 1” pipe to the attic. I might have to make another hole and run a few lines to the arttic vent. Do you have any pictures?
 
When I did my wireing for the tank I ran a 1” pipe to the attic. I might have to make another hole and run a few lines to the arttic vent. Do you have any pictures?
See photos in the post just above your post.
 
It makes total sense. There is a LOT of airflow in those open style drains. Forcing it to pull outside air is a great way to use that untapped resource.
That is exactly what I thought. I was scratching my head looking at all the plumbing going on, looking, scratching and then I heard a slight change in the tone of my vent hose for the standpipe as the water surged within my DT from my Jebao's when it hit me... Again, duh...
 
I have both for a few years now, on the lifereef skimmer and on the overflow.
Just make sure that once a month you stick the end of the tubing in a jug with warm RODI water to flush out the salt-creep.

I also advices to not so much chase your PH #, when tank is stable I noticed that corals will adapt to it.

889A861B-EB83-4371-8C97-4F29669C379D.jpeg
SPS grown in Avg 7.9 Ph, morning level 7.75 high afternoon 7.95
 
I have both for a few years now, on the lifereef skimmer and on the overflow.
Just make sure that once a month you stick the end of the tubing in a jug with warm RODI water to flush out the salt-creep.

I also advices to not so much chase your PH #, when tank is stable I noticed that corals will adapt to it.

889A861B-EB83-4371-8C97-4F29669C379D.jpeg
SPS grown in Avg 7.9 Ph, morning level 7.75 high afternoon 7.95
Agreed. Now my pH is more stable and it is one less thing I have to give a second thought to. Corals are amazingly adaptive creatures. Thank you for the salt creep advice.
Very nice tank BTW.
 
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Agreed. Now my pH is more stable and it one less thing I have to give a second thought to. Corals are amazingly adaptive creatures. Thank you for the salt creep advice.

No biggie my friend.
Now you get the hang on getting your Ph stable with just air try to do the same with nutrients through NMB.







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