Help with my neighbor's pool?

[byeloe]

I am trying to help my neighbor balance his pool water. It is a vinyl liner with around 95000 Litres or 25000 gallons. Here are the test results.
FC 2
TC 3
CYA 20 or less
PH 6.8
TA 120
CH 275

Water is clear(can easily see the bottom in the deep end) but not crystal clear

 

[mknauss]

I would suggest adding 10 ppm of CYA, aerating as much as you can to raise the pH, and increase your FC to target range for 30 CYA. Then do a Overnight Chlorine Loss Test in a day or two. See if the cloudiness clears up.

 

[byeloe]

Thanks, what do I use to raise the cya? Also do I just aim the jets at the top of the water to aerate?

 

[mknauss]

You use cyanuric acid, stabilizer, conditioner. Walmart or Canadian Tire normally have it in powder form. Use the sock method to add it.

Aim the jets at the surface for aeration.

 

[byeloe]

Back again. I managed to raise the cya upto 35-40 range. TA 100 PH 7.5 but the water is still not clear. They have an old pool, no bottom drain, skimmer in shallow end(no weir door), 3 return jets( 2 in the deep end 1 in the shallow end) The return jets have eyeballs that protrude with a side port.
They have a 2605 super pump(pretty old) and an s244T filter
I am curently slamming at 16 ppm FC, topping up Chlorine(bleach) at 7AM, 1PM and 7PM. I have left the vacuum hose in overnight to draw the water in from the bottom of the deep end.
Suggestions?

 

[zea3]

May want to deep clean the sand filter. How did they do on the OCLT? How many days into the slam?

 

[byeloe]

Thanks for the reply
This is the 3rd day, the FC this morning was 13.5. I was considering a deep clean, but the filter is in a shed and the plumbing connections are all done with hose clamps. I don't really want to be messing with the connections. They are 1st time pool owners and if my water wasn't crystal clear( after the spring swamp) they might be skeptical of the methods

 

[zea3]

Keep slamming, any lights or ladders that may harbor algae? If so then pull out the light and clean inside the niche. Pull out or clean behind any ladders. You can add some DE to the sand filter to help catch finer debris. Add enough DE 1 cup at a time to the skimmer until you see a 1ppm rise in pressure. Re-apply after backwashing the filter.

 

[byeloe]

Keep slamming, any lights or ladders that may harbor algae? If so then pull out the light and clean inside the niche. Pull out or clean behind any ladders. You can add some DE to the sand filter to help catch finer debris. Add enough DE 1 cup at a time to the skimmer until you see a 1ppm rise in pressure. Re-apply after backwashing the filter.

Thanks, would they have DE at home depot?

 

[splashpad]

Thanks, would they have DE at home depot?

Be sure it's Pool Filter DE, not the "garden" stuff. I was able to get HTH-brand Pool Filter DE pretty reasonably at walmart.

 

[zea3]

Check where they have pool supplies. Sometimes Home Depot has it and sometimes they don't.

 

[byeloe]

Couldn't find DE, but I did find HTH Liquid Clarifier

 

[splashpad]

No clarifiers! They waste chlorine (chlorine breaks it down) and/or cause filter mess

 

[byeloe]

No clarifiers! They waste chlorine (chlorine breaks it down) and/or cause filter mess

Ok thanks, I will look for the DE for pools