What would you say this pH level is?


LifeTime Supporter
Sep 15, 2013
Fayetteville, NC

What is the FC?
FC is Zero.

Seems to me the tube goes yellow, orange, pink so I was hoping this fell at 7.7 to represent red.

Never realized exactly how much aeration could affect pH! (Water level got low and have a jet that’s cracked allowing water to aerate. It has been a beast to get down!)


Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
Sebring, Florida
the colors going from low pH to high pH are
yellow 6.8 and lower
yellow orange 7.0
orange 7.2
orange red 7.4-7.5
red 7.6-7.8
red violet 8.0
violet 8.2 and higher

Your pH is 7.6
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TFP Expert
Mar 2, 2011
I'm seeing about 7.6. I think that most people read pH higher than it actually is.

You have to go by the hue more than anything else.
Last edited:


TFP Expert
Mar 2, 2011
It looks like 7.6 for both. Maybe get a pH pen if you want to be sure.

What's the TA?
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Bronze Supporter
Jul 17, 2019
Prosper, TX (DFW)
So, they are a little more of a pain to use?
I too have trouble distinguishing the PH in the kit and use the PH Meter to verify what I'm seeing. In my 1 week of use, I have not had to calibrate it at all, but its pretty darn easy to use. You turn it on, stick it in the water and it gives you the PH almost instantly.


TFP Expert
Mar 2, 2011
If a pH meter loses calibration and you don’t realize it it can lead you well astray. If you get pH readings you don’t expect you need to double check it with the OTO test.
I think you mean pH reagent or calibration solution?