Chem problems

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Pool: outdoor
15000 gal
Pebble tech (2002) gunnite
Jandy HE2 heater (380,000btu)
Intelliflo pump
Cartridge filter system (4 filters) cleaned regularly
Pool temp kept 90 degrees

Pool used daily - one to two people
Water is sparkling clear

Oto test kit plus TFP test kit
Ph7.4
FC 3 to 12ppm
TA 100
CH 400
CYA 60

Using:
Clorox conc for chlorine (8.25%)
Muratic acid 15% (Home Depot)
Baking Soda
CYa.

Cannot hold chlorine levels or ph for more than a day
Adding 1 gal muratic every 2 or 3 days to keep ph in 7.5 range
Chlorine levels do not hold for more than 2 days...

Watch the pool chem religiously

What am I doing wrong?
Is it the water temp?

Any suggestions
I am afraid to be gone more than a few days
The pool would be a mess

Just started using chlorox this spring
Had a salt generator prior

Thank you
BH

 

[JohnT]

Welcome to TFP!

You need to add chlorine daily. Generally enough to provide 2-3ppm to your pool, but that varies with conditions. With your CYA at 60ppm, you should never let your FC drop below 5ppm and should try to keep it at 7ppm.

Some water just wants to go to a high pH. Where does it go if you don't lower it?

 

[freqz]

40-60 oz of MA in a 15k gallon pool 2-3 times per week every sounds like A LOT.

Are you running a waterfall or spa spillover constantly?

 

[anonapersona]

You are keeping the TA rather high and the pH rather low. If you let the TA settle down to maybe 70, maybe 60, you should see the pH stabilize and you won't need so much MA nor baking soda. It is OK to let the pH go to 7.8, I find that everyone is fine with swimming underwater with no eye discomfort at 7.8 and 7.9 which is where my pool tends toward.


Why did you discontinue the SWG? If I had one, I'd keep it! Less frequent tending than manual chlorine adding. I understand that the costs are pretty much the same over the longer run.

 

[[email protected]]

Have seem ph in 8 range
But have added more muratic to bring it down

Thought the sodium hypochlorite may be producing NaOH to bring ph up?
Also NaHCO3 may be doing the same ?

Interesting

Does pool temp blow out the free Cl?

Thanks
By

- - - Updated - - -

No water falls
Do run the pump at 500 rpm 24/7

 

[[email protected]]

Thanks for the info

Swg discarded after replacing gen cart 4 times over 10 yrs
Probably should have purch #5
Lots of corrosion on pool heater cabinet from the salt

I will say I get more eye irritation from the water now w/o the salt


Tried increasing chlorine production on swg but produced a gel like substance in the pool
Ever hear of that? maybe I am jinxed
That was the last straw for the swg