In an earlier thread about my covered pool (roof + vinyl cover, with ozonator, 9800 gallons) I was advised to maintain 20 or 30 ppm CYA. I got the TF100 and my CYA is about 20 -- it takes the entire volume of the tube before the dot on the bottom disappears. I am adding 12% liquid chlorine everyday (see details below) and I'm itching to increase the CYA to 30 and see if I can add a little less chlorine daily. I'll have to take it slow trying to get from 20-30, since even the marvelous TF100 isn't very precise when it comes to CYA.
So -- should I go to 30? As I said my pool is under a roof and has a vinyl cover, so it only gets partial sun for maybe a couple hours a day during the week, more on the weekend. It just seems like I'm adding a lot of CL, but I have no experience to know if this is a lot. And I'm thinking of switching to SWG, but not for a year or so.
I'm trying to maintain 3 ppm FC, but I haven't really got the pattern yet. FC seems to drop pretty sharply in 24h when I don't add any CL.
Any suggestions?
So -- should I go to 30? As I said my pool is under a roof and has a vinyl cover, so it only gets partial sun for maybe a couple hours a day during the week, more on the weekend. It just seems like I'm adding a lot of CL, but I have no experience to know if this is a lot. And I'm thinking of switching to SWG, but not for a year or so.
I'm trying to maintain 3 ppm FC, but I haven't really got the pattern yet. FC seems to drop pretty sharply in 24h when I don't add any CL.
Any suggestions?
date | FC | CC | pH | CYA | CH | TA | Added |
7/18 | 1.0 | 0.5 | >7.6 | 20 | 400 | 100 | 10 oz 12% CL |
7/19 | 1.5 | 22 oz 12% CL | |||||
7/20 | 3.5 | 0.5 | nada | ||||
7/21 | 2.5 | <0.5 | >7.6 | 12 oz 12% CL | |||
7/22 | 3.0 | 0.5 | >7.8 | 10 oz 12% CL, 24 oz 35% mur. acid | |||
7/23 | 3.0 | <<0.5 | 7.6 | 10 oz CL | |||
7/24 | 3.5 | 0.5 | 10 oz CL | ||||
7/25 | 4.0 | <0.5 | 10 oz CL | ||||
7/26 | 4.5 | <<0.5 | nada | ||||
7/27 | 3.0 | <0.5 | 7.6 | 12 oz CL | |||
7/28 | 4.0 | <<0.5 | 8 oz CL | ||||
7/29 | 4.0 | <<0.5 | 8 oz CL | ||||
7/30 | 3.0 | ND | 10 oz CL | ||||
7/31 | 3.0 | <<0.5 | >7.6 | 10 oz CL |