Clear Pool but cannot maintain free chlorine level?

[waste]

Welcome to the forum!

Add ~ 250 ml 6% bleach to the pool. with the pump running, as soon as possible. Use the acid they sold you to clean the cell (mix it 10 parts water to 1 part acid and let it 'fizz' for about 5 minutes. Then rinse the cell to see if there is still the deposit and repeat , if necessary.

You didn't mention the pH reading, which makes it hard to say if you actually need to lower the alkalinity - I'm thiking you don't have to worry too much about it, but might want to eventually bring it down by keeping the pH closer to 7.2 and aerating.

Phosphates are the latest "bogyman" that pool stores are pushing - unless and until you have a persistent algae problem, don't worry about it

There used to be a program called 'Bleach-calc 262' (if memory serves) here that would let you plug in your current test results and then tell you how much chemical to add to get you to your 'ideal' set of numbers for your pool. I can't find it now but, if you can post your free chlorine, combined chlorine and pH, we'll be better able to help you address your issue.

Is the SWCG telling you that anything isn't right? (it seems like it's not producing enough chlorine)

[Mr.Mooks]

Thanks Ted. They did not give me a PH reading on the piece of paper they gave me. But he did say it was high but that is excpected with SWcG's he says! I think he said if memory serves it around 8.0 and that is what is see when I test. All the paper said was my Chlorine is 0.2 not sure if that means free or total?. The SWCG it not telling me anything is wrong it even says my salt levels are good enough. I will clean the cell and let the SWCG test again and go from there. Funny thing is the first person I delt with at the store thought the SWCG was falty and it was purchased there, but the manager said no he thinks it my levels and phosphates are eating the chlorine. I hope it all works out. Looks like I may have spent money for nothing!

[CarlD]

Ted probably knows more about SWCGs than me, but a TA of 185 with one is SURE to see you with high pH...too high! But 5 LITERS of Muriatic acid? I wouldn't put 5 liters of ANYTHING in a pool at once other than...water itself.

Here's probably a good set of numbers to aim for, but the SWCG manufacturer's recommended levels should be approached.
CYA: 80
TA: 80
FC: 4 or more
pH: 7.2-7.8

Ted or some of the other pros may give you better guidance but SWCGs DO tend to increase pH. I don't know if it's the nature of the beast or that something's out of adjustment, but with your low CYA, you can use Tri-Chlor tablets in a floater. They are extemely acid and will help control the pH, plus they add stabilizer, which you need as well.

Carl

[SalemCastles]

The poolcalculator.com suggests 1.3 litres of muriatic acid to go from 8.0 to 7.2 with a TA of 185. Perhaps trying half of that and rechecking would be the best approach. Are you in the GTA area?

[Mr.Mooks]

Thanks Glen. I was going to start with a lower amount. Did not get time last night. I think they were just trying to make a little extra by selling me all the stuff. I am in Barrie.

[Watermom]

It is usually best to go with small additions of acid, retest, then redose if needed instead of trying to get to the target with one big dose.

[Mr.Mooks]

I want to thank everyone who has helped me out on the site with this issue. So glad to have found this site. I am going to start first with cleaning the plates and then add a little acid. I will then recheck my levels after about 2 hours.