Testing pool for the first time using legit TFT 100 pro— thoughts on what to do next

[caitym]

I have the app and read through the pool school, but I want to be sure. I seem to have a hard time determining the color of the 7.8 ph vs 7.5. I haven’t reinstalled the salt cell, so I’m using liquid chlorine. I have a fiberglass 14,500 gallon pool btw!
FC- 2
PH- 7.8
TA- 80
CH- 275
CYA- followed directions to a T and filled whole tube and still saw the black dot. So under 20?

 

[mknauss]

Do not commiserate over whether the pH is 7.5 or 7.8. Only real concern is if it is 8 or above, so violet/purple tones. Or below 7, or yellow tones.

Have you added any CYA/Stabilizer? If not, add 30 ppm worth.

 

[Jimrahbe]

C,

Without any CYA, your FC will disappear faster than a hunk of meat in front of a hungry dog..

I suggest that you add 30 ppm of CYA, for now..

Once your CYA comes up, I would get your FC up to 5 ppm.

Install the SWCG and the slowly bring your CYA up to 60 or 70..

Thanks,

Jim R.

 

[Newdude]

We got you Caitym.

 

[pjt]

I seem to have a hard time determining the color of the 7.8 ph vs 7.5.

Two additional techniques:

1. Try holding the block sideways or upside down. Sometimes that helps distinguish colors better. I also use two old hotel keycards to mask off areas and narrow down my decision.

2. To get a consistent backlight, hold the block in front of your computer monitor with a blank white screen displayed (I use Google's homepage).

 

[caitym]

C,

Without any CYA, your FC will disappear faster than a hunk of meat in front of a hungry dog..

I suggest that you add 30 ppm of CYA, for now..

Once your CYA comes up, I would get your FC up to 5 ppm.

Install the SWCG and the slowly bring your CYA up to 60 or 70..

Thanks,

Jim R.

What’s weird is that I added 2/3 of a gallon of liquid conditioner stablizer last week when I used my older kit to determine cya. I’m shocked nothing is registering.

 

[caitym]

Do not commiserate over whether the pH is 7.5 or 7.8. Only real concern is if it is 8 or above, so violet/purple tones. Or below 7, or yellow tones.

Have you added any CYA/Stabilizer? If not, add 30 ppm worth.

That’s good to know! Thank you! I added a 2/3 gallon of liquid stabilizer a week ago based on my old kit results. I’m surprised it didn’t bring it up at all.

 

[mknauss]

Not enough to get to 30. And using a part bottle of that stuff normally gives you less than you expect. Dump the rest in and clean out the bottle well.

 

[wireform]

Outdoors towards the sky with a bright cloud in the background or a brightly lit white molding on the home exterior or even a outdoor white seat cushion will make the different shades jump out at you.