Help to identify color for PH

[offtheclock]

Guess my eyes are not that great. I say 7.8 my wife says 7.5. Please let me know what you think. Just need a good reference. FC is low because just got a new Pentair VS installed on Saturday after original one went out a week ago.

 

[JohnT]

7.8. 7.5 will have just a touch more yellow. Match how yellow it is rather than the exact shade.

Sometimes it helps to add one more drop of reagent.

 

[PieterS]

I'd probably go with 7.8 as well - but honestly wouldn't matter much if you called that 7.5. Both are well within range. As long as you're not touching 8 - you can always just add a bit less acid if you are going to adjust.

 

[Newdude]

If it helps for either side of the block……. I cover the value above and below what I’m looking at with my fingers. It makes it easier IMHO to only match one color instead of trying for best of 3.

Nope……. It’s not that one.
Nope……. It’s not that one either.
Meh……. This one is pretty darn close.

 

[jtpipkin]

I'd record at 7.65 and call it a draw - no, seriously, I would

 

[pjt]

Try holding it sideways or upside down. That often helps me distinguish color better.

 

[ajw22]

7.5 or 7.8 are equally good. No real practical difference. I would have called it 7.5.

 

[Getitrite]

I use the index card "filter".

 

[HermanTX]

I mainly use the Taylor 2000 series comparator. If I am stumped on which pH level, I add the R-0005 Acid Demand Reagent to see the change in color and that helps me define my original reading. This is only valid with use of 2000 series comparator that comes in the K-2006 kit.

 

[Newdude]

use the index card "filter".

Just. Like. That. Only the redneck way.

 

[offtheclock]

Some great ideas. Thanks everyone!