First opening ever / what to do before turning on SWG

MostlyCanuck

Bronze Supporter
Mar 19, 2021
58
Toronto, Ontario, Canada
Pool Size
18800
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Hoping someone has better searching/filing skills than I do..

A long while ago I recall reading one or two posts on the recommended approach to start adding chemicals, for a brand new pool, using a SWG. I think I recall the recommendation was to *not* turn on the SWG right away but by first reaching the target chlorine levels with a one-off dump of liquid chlorine - or perhaps a few days of trichlor/dichlor to also get to the right level of CYA - and then switch to the SWG for daily chlorine top-ups once the chlorine and CYA are at target.. I think this is was the recommendation at least. could be mistaken.

Can't find those posts. If anyone recalls what I'm referring to, grateful if you could link. If you don't, but you can reiterate the recommended solution, that's v helpful too!

Thx
 

Oly

Gold Supporter
Jun 28, 2017
1,815
Fresno, CA
Pool Size
27000
It would be best if you would post your current water chemistry levels before someone attempts a recommendation. That said your SWG is best tasked to maintain your desired level of FC. Bringing your FC into the target range first with alternative chlorine additions before powering up your SWG is preferred.
 

wireform

Silver Supporter
In The Industry
Aug 15, 2017
2,100
Spring Valley, NY
As Oly said, get the pump running to circulate the water, rid the water of all organics, do a test to see the pool chemistry, bring PH to 7.2 and then do a slam as per the CYA level you have. If the water isn't bad the slam should culminate with a OCLT tether sooner than later. Let us know if you need something specific.
 

MostlyCanuck

Bronze Supporter
Mar 19, 2021
58
Toronto, Ontario, Canada
Pool Size
18800
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
it would be a brand new pool, so clean tap water goes in. will definitely do a baseline chemistry test and figure out additions via pool math app, but it'll be just municipal tap water w/out chemicals. and it's vinyl, no plastering.

my questions were (i) whether it was recommended to turn on the SWG for chlorination from the get-go vs. first bringing the chlorine levels to target with liquid chlorine and then using the SWG for daily top-ups; and (ii) whether there's actually an advantage to start with tri/dichlor pucks till target CYA is reached and then switch to the SWG (as opposed to adding CYA separately).

hope this makes more sense now! thx all
 

CrystalRiver

Well-known member
Jun 19, 2020
532
Massachusetts
If it's new plaster, then you need to follow the new plaster startup instruction. No SWG in that case, because you can't add salt in the first 30 days.

If you're past the 30 days or it's not a plaster pool, then throw the salt in and get it dissolved, then wait 24 hours. (Use liquid chlorine in the meantime.) Bring your FC level to target using liquid, make a guess as to SWG settings and walk away. 24 hours later, come back and test again. FC too high? Turn the SWG down a notch and come back tomorrow. FC too low? Bring it to target using liquid chlorine, adjust the SWG up a notch, and come back tomorrow.

The idea is that the SWG is very good at maintaining levels, but much too slow to bring them up in the first place.

The advantage to adding liquid chlorine and CYA separately is you get your chlorine in there immediately. Pucks take a long time to dissolve, and are better at maintaining than getting chlorine in there right now.
 
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Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
6,880
NY
Hey MC !!! When you get a minute fill out your signature so people don’t have to ask questions about your questions. Like if it’s a plaster pool for example.

If you are using a mobile device, turn it sideways to see everybody’s signature as an example and list everything that you have/know. (y)
 

MostlyCanuck

Bronze Supporter
Mar 19, 2021
58
Toronto, Ontario, Canada
Pool Size
18800
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
If it's new plaster, then you need to follow the new plaster startup instruction. No SWG in that case, because you can't add salt in the first 30 days.

If you're past the 30 days or it's not a plaster pool, then throw the salt in and get it dissolved, then wait 24 hours. (Use liquid chlorine in the meantime.) Bring your FC level to target using liquid, make a guess as to SWG settings and walk away. 24 hours later, come back and test again. FC too high? Turn the SWG down a notch and come back tomorrow. FC too low? Bring it to target using liquid chlorine, adjust the SWG up a notch, and come back tomorrow.

The idea is that the SWG is very good at maintaining levels, but much too slow to bring them up in the first place.

The advantage to adding liquid chlorine and CYA separately is you get your chlorine in there immediately. Pucks take a long time to dissolve, and are better at maintaining than getting chlorine in there right now.
if there was a button to triple-like your reply, i would have pressed that. this is exactly the guidance i was referring to and hoping to find. much appreciated
 

Candurin

Well-known member
Jun 30, 2017
243
South Jersey
Pool Size
13000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Hey MC !!! When you get a minute fill out your signature so people don’t have to ask questions about your questions. Like if it’s a plaster pool for example.

If you are using a mobile device, turn it sideways to see everybody’s signature as an example and list everything that you have/know. (y)
I’ve been using this site for awhile. NEVER realized turning the phone sideways showed the signatures. I just as well assumed that sigs were hidden on mobile to save load times and screen real-estate. Awesome.
 
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