PH flux

[KAiNE]

How much does your PH fluctuate? I run my fuge's light cycle opposite of my display. I also feed outside air to my skimmer to help drive off elevated CO2 levels. My ALK is about 9.2.
I only get a PH of 8.3 when my Kalk tub is almost empty.



http://cjszoo.com/ReefPics/10.25.06.Graph.jpg

[crumbletop]

My pH varies about .2 over a 24 hour period. Low is around 8.15-8.2 and high is around 8.35-8.4. The top and bottom drop some when my reactor starts running out of kalk, which is usually my signal to add more kalk to the reactor. Looks like yours is a bit more blunted than mine (a swing of around .14). I'm not familiar with KdH so I'm not sure what that alk means. I keep my alk around 3.0 meq/l which I believe is balanced with calcium of 410, which is where I try to keep the ca. I keep my temp right around 79.

[KAiNE]

Yea.. I use meq/l for ALK as well but thought most people use dkh. My ALK is 3.3 meq/l and Ca is about 425.

Do you run a reverse lighting schedule on your fuge?

Thanks!

[crumbletop]

Your alk/ca sounds right on. I don't have a fuge. I've thought about adding one at some point but don't have one now, so I don't have anything in my setup to try and keep the pH stable. Is the typical day/night fluctuation harmful to corals? I know that stability is key, but my general impression is even the TOTM-type folks have fluctuating pH.

[KAiNE]

Yea... I kinda just wanted to see how mine compared with others who can track theirs overnight.

Thanks!

[APFish]

I just got my AC jr up and running. I am embarrassed to say that my fluctuations are worse then yours. I have been trying to get mine a little more stabilized with vinegar. I also did a water change. I will post my results next week when hopefully the swimming numbers have slowed down. I too am curious to see what everyone else is doing.

Rob

[crumbletop]

<a href=showthread.php?s=&postid=8414005#post8414005 target=_blank>Originally posted</a> by APFish
I have been trying to get mine a little more stabilized with vinegar. I also did a water change.

What's your pH and alk?

[gflat65]

I get a swing from around 7.9-8.2 throughout the day...

[KAiNE]

I started opening windows the other day, made a difference!


http://cjszoo.com/ReefPics/10.27.06.graph.jpg

[crumbletop]

You will get the same effect if you just don't breathe when you are inside. LOL, jk.

That is cool to see the role CO2 is playing...

[APFish]

OK. my problem has been solved. I am fluctuating between 8 and 8.20 for the last two days. For some reason my probe got knocked out of calibration. For once in this hobby I lucked into something. I was really dosing the heck out of vinegar and Baking soda. Luckily the tank is pretty resilient and it was able to survive until I let common sense win over what a computer was telling me.

Rob