New to Me Pool - Want to make sure I am on the right track

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nelsonatc
I'm new here
I'm new here
Posts: 3
Joined: Thu 06 Jun, 2019 07:24
My Pool: 27' Round Hayward AG, 48" average depth. 15,400 gal
Filter: Hayward Pro Series Sand Filter S180T92S
Pump: Century SP1510 1hp

New to Me Pool - Want to make sure I am on the right track

Postby nelsonatc » Thu 06 Jun, 2019 11:06

Hello All!

I bought a house and inherited a 2 year old 27' AG pool (15,400 gal), running a sand filter. Electrical and bonding has been brought up to code. Filter and pump tested and operational.

I picked up a K2006 kit and ran a battery of tests yesterday:

pH-Yellow, so assume it is <6.8
CYA - 0
FC - 0
CC - 0
TA = 20ppm

The seller told me he left everything he had for the pool. I only found 5 gal empty Chlorine jugs. No other chemicals or test kit was found. It looks like he just dumped in chlorine and hoped for the best (typical based on some of the half-ass work I have found in the house to date)

Water is greenish, with leaves on the bottom of the pool (PO covered without cleaning). I can feel a slime on the walls

My plan:
Raise pH to 7.4
SLAM with Trichlor to add CYA and chlorine. Switch to straight liquid chlorine once CYA gets to 30ppm


27' Round Hayward AG, 48" average depth. 15,400 gal
Hayward Pro Series Sand Filter
Hayward 1hp Pump
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1161
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: New to Me Pool - Want to make sure I am on the right track

Postby Denniswiseman » Thu 06 Jun, 2019 17:04

Sounds like a reasonable plan
You would need to Slam (Shock Level and Maintain) at about 10ppm
The only thing with Trichlor is you can't be that precise with your dosing
With a low TA you will want to raise that as well as pH
Also a good brushing
You can also use Pool Maths to work out what quantities to use


For every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.
For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.
For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by at least 7 ppm

Liquid chlorine (sodium hypochlorite or plain bleach)
Muriatic acid (hydrochloric acid) to lower pH and TA
Bicarbonate of soda to raise TA
Aeration will raise pH only
Soda ash will raise pH and TA
Teapot
Swimming Pool Superstar
Swimming Pool Superstar
Posts: 894
Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: New to Me Pool - Want to make sure I am on the right track

Postby Teapot » Thu 06 Jun, 2019 17:53

Don't bother adjusting pH or TA yet, both will rise when chlorine is added and chlorine is more powerful at the lower pH. Add chlorine at night so it doesn't get burned up by the sun. Deal with the algae first and adjust levels later. Being vinyl you do not require the TA level higher than about 40ppm. That will stop the pH rising. Using a low TA means pH adjusting uses a lot less acid or alkai but there really is no need to have 80-120 that figure is for concrete plaster and tiled pools
nelsonatc
I'm new here
I'm new here
Posts: 3
Joined: Thu 06 Jun, 2019 07:24
My Pool: 27' Round Hayward AG, 48" average depth. 15,400 gal
Filter: Hayward Pro Series Sand Filter S180T92S
Pump: Century SP1510 1hp

Re: New to Me Pool - Want to make sure I am on the right track

Postby nelsonatc » Wed 12 Jun, 2019 13:04

Update:

All is going well. Ended the SLAM a couple days ago. Kids used the pool last night with no issue.

Ran full battery of tests this AM:
FC - 4.0
CC - 0
pH - 7.4
TA 70
CH 40
CYA - >20 (when i fill the tester to the top, its a little cloudy, but not disappearing yet)
Temp- 72F

At this point, I am clorinating with Triclor pucks, and will continue to do so until I reach a CYA or 30, then I will transition to liquid chlorine.
27' Round Hayward AG, 48" average depth. 15,400 gal
Hayward Pro Series Sand Filter
Hayward 1hp Pump
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1161
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: New to Me Pool - Want to make sure I am on the right track

Postby Denniswiseman » Wed 12 Jun, 2019 13:35

Those figures look good, you might just want to do an overnight chlorine loss test OCLT to be100% sure
nelsonatc
I'm new here
I'm new here
Posts: 3
Joined: Thu 06 Jun, 2019 07:24
My Pool: 27' Round Hayward AG, 48" average depth. 15,400 gal
Filter: Hayward Pro Series Sand Filter S180T92S
Pump: Century SP1510 1hp

Re: New to Me Pool - Want to make sure I am on the right track

Postby nelsonatc » Wed 12 Jun, 2019 14:04

I have done testing in the evening and first thing on AM when I was SLAMing. Once I got 2 days of less than .5 loss, I ended.


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27' Round Hayward AG, 48" average depth. 15,400 gal
Hayward Pro Series Sand Filter
Hayward 1hp Pump
Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 1161
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: New to Me Pool - Want to make sure I am on the right track

Postby Denniswiseman » Wed 12 Jun, 2019 16:20

That's perfect, you're done
All you need now is to keep on top of it by keeping regular dosing of chlorine

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