Low PH bugging me

mc-cro

(macro)
I have never been one to pay attention to PH. Heck, I have never even had a PH meter until just this past winter. I know a lot of people put a lot of effort into trying to maintain the "optimal" PH, and I really think they often cause more issues, especially when they start trying to add buffers to stabilize or bring it up.

That being said, now that I have a constant PH monitor on my controller, I can see that my PH is chronically low, at 7.7- 7.85 In the 8 months since I have had the monitor set up, I dont think it has ever risen above 8.0. ( I have calibrated several times) I read that most people shoot for 8.0-8.2, and that below 7.6, you start dissolving calcium.

I am sure the lower PH is C02 related. The sump room is closed off, plus I run a C02 reactor. Since my ALK is fine, at 9.6, the PH should be a little higher naturally, I think? but I am pretty sure the excess C02 is driving it down.

So, the big "I wonder" keeps haunting me. I wonder if I can get just a little better SPS growth if I get the PH up a couple of points.

I considered running a fuge on opposite lights, but I dont have a fuge, and I cant get cheato to grow in my system, so thats out.

I could run my frag tank on an opposite cycle, but I really dont want to have to get up at 3am to see my frags, plus I am not sure there is enough to offset the ph drop

I thought about adding Kalkwasser in my ATO. but my levels are rock solid right now with my CaRX, so I dont want to go messing with that.

I considered running an airline to an open window, but every time I turn around someone is spraying pesticides or chemicals out in yard, so I dont want to run that risk.

I have heard good things about sodalime, so I think I am going to give that a try. I ordered some stuff the other day, so I when I get back home, I will hook up a "C02 scrubber" to my skimmer intake and see if that brings my PH up a couple of points.

Then the real test, will my SPS appreciate it, or will it just be for my own piece of mind?
 
We have the same issues as you have in our 150 G tank that has been up and running for about 22 months. We run a CO2 scrubber and it helps a bit, but if you can leave the windows open for just part of the day it sure makes a big difference. it also helps to have good top water movement.
In our experience as long as you stay above 7.8 you will have no bad effects re growth, or color. We grew 1" frags to 8-10" colony's in 20 months with PH between 7.75 and 8.1

Hope this helps
wrimda
 
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