TF-100 Questions

[Rambo]

My Numbers

FC = 7.5
CC = .5
PH = 7.8
TA = 110
CH = 250
CYA = 80
SALT = 3200

How accurate is checking CYA with inside lighting?
Using K-1766 to test salt. The first trime it changes to salmon red is this the stoping point or when it stays salmon red?
Adding acid weekly to keep ph down is this normal with salt system?

 

[linen]

How accurate is checking CYA with inside lighting?

Indoors definetly can affect the acuracy. From the extended test kit instructions:

Stand outdoors with your back to the sun and hold the view tube at about waist level. If sunlight is not available, find the brightest artificial light you can.

Using K-1766 to test salt. The first trime it changes to salmon red is this the stoping point or when it stays salmon red?

This is a tricky test. I beleive it is the first time is changes to salmon...it is really easy to go to far and get brown...you do not want brown. From the instructions:

NOTE: Do not add enough R-0718 Silver Nitrate Reagent to give a brown color. First change from yellow to a milky salmon (brick) red is the endpoint.

Adding acid weekly to keep ph down is this normal with salt system?

Yes. You may want to lower your TA, since the swg will cause your ph to rise at your TA level fairly fast. Our recommedation is 60-80 ppm TA for swgs: http://www.troublefreepool.com/pool-school/water_balance_saltwater_generator