How much CL from SWCG?

[mas985]

mas985: It's a Triopure 50. So, should I assume the maximum amount of CL I should see would be 2.6? Or, is this additive. That is it will add 2.6 each day minus any amount lost due to the sun? If so, I would have expected the CL level to stabalize by now.

It is additive but you will find that most is lost during the day depending on your CYA level. Mine is set to put in about 1.6 ppm per day and I have a residual of about 2.5 ppm after the run time. During our hot spell, 100+ days, the residual dropped to 1.5 ppm so it does depend on temp.

Update: CL dropped again today (Day 6: TC: 5.5, CC: 0) but by only 1 ppm. Temps here in VA have been in the mid 80s and partly sunny conditions. I find it hard to believe it would burn off both what new CL was generated plus losing 1 ppm of what was in the pool.

Take a look at chem_geeks chlorine charts in the china shop.

http://www.poolforum.com/pf2/showthread.php?t=4236

They give you the half life at different CYA levels. Generally, if you have twice the residual, you will lose twice as much during the day but at higher CL levels the half life tends to be a little lower.

I think that you will find that the pool should stabilize between 1 to 2 times the added chlorine per day. Assuming no other consumption besides UV. So for you, I would expect it to stabilize between 2.6 and 5.2 ppm.

As you guys can probably tell, I am a newbie and do appreciate all the help. This forum has been a wealth of information both on building the pool and now operating/maintaining it.

Thanks so much!

Please let us know where it does stabilize.