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Understand. Thanks!

Yes that's possible :rolleyes: Ok will advise to start with fresh water .. if there's no other solution

Not doing much yet except chlorinate with pucks. I'm trying to get him to do it by your guidelines. But I guess I stepped in too late,.fresh water would've been better.

It's not newly plastered. It was re-painted and re-fillled with old water

True, it wasn't completely fresh water. But it's the way it is though, the CYA.

Asking for a friend: in what order should we start balancing the chemistry? Since some affect the other, like TA and pH. Which first? 75000 gallons plastered pool (10 ft deep) Test results with Taylor K2006C testkit : TA 0?? Turned red rightaway PH ?? Color yellow in test result CYA 80 FC...

Hello all! I received the Taylor 2006C kit. These are the result from this morning: FC 4.6 CC 0 pH +/- 7 ?? See picture CYA 55 TA 80 CH 120 pH was 7.8 yesterday and I lowered it, a bit too much apparently, but its rainy these days so might be up again tomorrow. I want to replace some...

An update on the situation: have been adding liquid chlorine 6% for 4 days now, total of 380 oz (11 ltr). And daily brushing. The results are slow and small. Also tried lowering pH by adding muriatic acid, slight change as well. Yesterday's pH was lower, but had some rain last night so maybe...

I will go look for liquid chlorine just to be safe!

I guess the lady made a mistake mentioning dichlor and it's just the cal-hypo then, as it says on the label. But you say 90% is impossible?

The supplier, Pools SXM ...

Thanks! Should I lower pH first before raising FC?

There is no mention of ingredients on the product label. I asked the supplier (SXM Pools - apparently they label the stuff themselves, with only their name and some warnings on it) and this is what they told me.

ADDITION: Total alkalinity with the drop test was 110ppm

ADDITION: the PoolMath calculator doesn't allow me to choose Dichlor 90% Cal-Hypo ... (the Klor-Shock I have)

Hi, I'm new to pool maintenance and have been put in charge of maintaining a recently replastered 11.000 gallon square pool (on a Caribbean island), that uses a sand filter. I need to get the chemistry up to standard! Please note that the closest pool experts/ shops are on a neighboring island...