All set - now just waiting for SWCG to arrive!

sultanoswing

Member
Mar 25, 2015
12
New Zealand
Am mostly set with the chemistry in our 50,000L plaster pool to convert from liquid chlorine to SWCG.

FC 5, TA 70, CYA 63, CH 290, salt 3499, pH 7.7. Am adding boric acid this weekend, aiming for 40ppm (bit worried about killing bees tho - not that I've seen any come to drink).

I also plan to bring the CYA up to 70 over the next few days, and the CH up to around 350.

I have a reciprocating saw, pvc primer and cement ready and waiting. The smart plug is integrated into Home Assistant.

Now I just need the actual chlorine generator to arrive from eBay - a Laswim EC20 - and some warmer swimming weather!
 
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Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
10,813
NY
Hey Sultan !!! Glad you’re not in Dire Straits. (I’ll be humming it all day now, THANKS).

the CYA can’t be easily read between 10 values so we always round up. Call it a 70 now and just keep tabs on it once it deteriorates (4ish ppm a month plus a skootch from rain) and be ready to adjust it up when it actually hits 60.
 

setsailsoon

Gold Supporter
LifeTime Supporter
TFP Guide
Oct 25, 2015
4,226
Palm City/FL
Pool Size
12800
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-30 Plus
s,

Congrats on the swg you're gonna love it! FYI you can use Pool Math to estimate settings and run time. Your output should be 1.06 lb/day. At this rate you should see 3 ppm FC addition with 70% power and 8 hr per day run time. With your VS motor you'll be able to optimize power consumption and it may be better to run at low speed with a much lower % power for longer run time. You can play around with this in the "effects of adding" section of Pool Math. Just select swg as the chemical and plug in the numbers. Be sure to set the pool volume.

I hope this is helpful.

Chris

PS the size of your pool in the signature is different than the size you describe. You may want to fix this.
 

Mdragger88

Bronze Supporter
Jun 1, 2018
2,968
Hernando, Ms
Pool Size
26000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Intex Krystal Clear
Congrats 🎉
Until your swg is up & running follow the chlorine side of the FC/CYA Chart.
Go ahead & call that cya 70 like stated above so target 8-10 ppm fc for now.
You don’t wanna have to SLAM Process or start off your swg journey with a nascent algae bloom & wonder why your new device isn’t keeping up. Better to be safe than sorry 😁
 

sultanoswing

Member
Mar 25, 2015
12
New Zealand
Thanks all - great suggestions.

Yes, will get to adjusting my pool volume in the profile [EDIT: done]. I originally estimated it by measuring the width, depth etc (it's a kidney pool with a sloping shallow to deep end, and a cut out entry - so lots of fiddly bits). I've now adjusted that down based on the measured values (TFT-100 kit) of adding chemicals, set against the "effects of adding" in the pool math app. Not perfect, but better than nothing.

Having a VSD200 pump (speed 3, 125L/min for 12 hrs/d) and a smart plug on the chlorinator will allow for near infinite control. Probably too much - I won't be able to stop fiddling with the thing!
 
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setsailsoon

Gold Supporter
LifeTime Supporter
TFP Guide
Oct 25, 2015
4,226
Palm City/FL
Pool Size
12800
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-30 Plus
I got some great advice early on from one of our experts to try not to "over manage" the swg. Your swg should be able to run at constant % power and run time such that the FC cycles a few ppm above target and down to target as use, daylight exposure etc cycle. This way you never get to minimum. For me, all I had to do was adjust run time a couple times per year. I was in my 3rd year of operation like this when we sold the house.

I hope this helps.

Chris