SWCG output?

[larry2338]

The reason I asked:
In reading through this article (http://truetex.com/poolcontrol.htm) I was not so interested in his computer controlled direct injection of chlorine set-up as I was his opinions on CYA and running a pool with 0% CYA.
I was wondering if my pool could be run with very little CYA, perhaps 10ppm, with the SWCG set on a high level running 8-10 hrs/day during daylight hours. Simply trying to figure out if a SWCG has the capacity under these conditions to maintain a chlorine level of 1%-2% in my 20,000 gal pool.( It appears that he determined he needed an injection of 250 mL/hour of chlorine during daylight hours into his 27,000 gal. pool.)
So, I was just curious as to the feasibility of running very low levels of CYA in a SWCG pool.

[PatL34]

Yes you can, but only in winter. In summer you need the CYA. I generally run from 40-50ppm.

Hope this helps.

Pat

[Poolsean]

To be more exact. You can run low cya, but the chlorine will be consumed rather quickly when it goes into the pool. Which means that your swc will have to run at a high output almost of the time. Which also means that the cell will wear out rather quickly.
The fact of the matter is that running it this way will also mean that your pH will remain fairly steady.

[Looony2nz]

I think this is related...our CYA is 60ppm, however, TC, FC and CC are 0.
(new pool, salt level says 3100, has been reading 3200/3300 past 2-3 weeks since startup), thinking cell isn't producing chlorine.
It was 0 the other day, added a little liquid chlorine, it went up obviously, then 4 days later at 0 again.
Until Aquarite tech can come out (??, possibly wed.) we've added some chlorine again.....but figure the SWG isn't making anything if we have sufficient CYA.
?

[waterbear]

I think this is related...our CYA is 60ppm, however, TC, FC and CC are 0.
(new pool, salt level says 3100, has been reading 3200/3300 past 2-3 weeks since startup), thinking cell isn't producing chlorine.
It was 0 the other day, added a little liquid chlorine, it went up obviously, then 4 days later at 0 again.
Until Aquarite tech can come out (??, possibly wed.) we've added some chlorine again.....but figure the SWG isn't making anything if we have sufficient CYA.
?

Just curious, what is the output percentage that you have your cell on and how many hours a day is the pump running? Are any of the lights on the unit on?

[Looony2nz]

<<Just curious, what is the output percentage that you have your cell on and how many hours a day is the pump running? Are any of the lights on the unit on?>>

hi, output percentage has been at 90 percent (actually, when you click the readout a few times to get the actual readout, I believe its actually at 98%) since startup 3 weeks ago. Pump/filter running 9am - 5 p.m. The only lights on are the 2 green lights ("generating" and "power" or whatever) Nothing blinking or anything.

[Poolsean]

How large is your pool? Have you added anything to your pool for any algae treatments? Or any other chemicals other than chlorine and acid?