color rubbing off the bottom of the pool

[SkidRowe]

hello all,
I have a 1 year old salt water pool. we recently noticed that when we were standing in the pool the color was rubbing off below our feet. PH is about 7.5 FC is 3.5.

any idea what might be going on and what I should do about it?

Thanks

 

[Casey]

You are talking about the liner, I am assuming since you noted you are standing in the pool?

Please, post a full set of test results and not just a couple results.

Also, please note make and model of pool so we know if this is an Intex or steel walled above ground pool with liner.

 

[SkidRowe]

Sure,
Numbers are in line and have been All year
Steal walled 18 x 40 Sentinelle AGP (Aqua Leader)
Fc = 3.5
Tc =3.5
PH =7.5
Ta = 40
Cya = 65
Salt = 3100

 

[duraleigh]

I would suspect it is the quality of the printing on the liner. I witnessed the same thing in a pool with all chemistry numbers correct.

In that case, it was the suction-side Kreepy Krawly that simply removed the printing from the vinyl in those areas where it lingered.