Pink Mold In Pool

[CarlD]

Hi Larry and welcome to the Pool Forum!

I think I can get you started on fixing this.

I think you mean mold, not a mole (a rodent).

First, if your FC =3, and your CC=0 then your Chlorine (total chlorine) cannot be 5. TC = FC + CC always. Something's not right with your tests.

But, putting that aside, here's what I can tell you: With level of Cyanuric Acid (CYA) of 70, you need for your Free Chlorine (FC) to always be between 5 and 10...now it's 3 or AT BEST, 5--the bottom limit.
You need more chlorine.
Your pH, Cal. Hardness (CH) and alk are all fine..no need to mess with them.

Here's what I suggest you do: Shock your pool with 3 gallons of regular unscented 6% ultra bleach. (If your liquid shock is 12.5% Sodium hypochlorite, you can use a gallon and a half of that instead). This should bring your pool up to "shock" level, around 20. If the free chlorine level stays high overnight, you should be OK. Meanwhile, run your pump 24/7, and brush your pool!

You should also go over to our sister site, PoolSolutions dot com and read up there.

Carl