I've been a lurker for a while and understand the basic of water chemistry. I'm not expert by any means, but I get the big points. I have a FAS/DPD, of course; Taylor 2006, so all my test results are from that*. I just finished SLAMing my pool for open, and everything blued up and looking great. I just installed a Hayward AquaTrol, though I'm not generating right now as I'm waiting for FC levels to come down. Unfortunately I ran out of 0871 on my last day of SLAM, so my chlorine numbers are off of strips until more reagent comes in. I also have a little hot-tub, that I have been running an drop in SWG for about 3 years, again water looks great.
Pool (7600gal):
FC: 10+ (Strips)
PH: 7.5
TA: 125
CH: 200
CYA: 50
Temp: 68
CSI: -.036
Spa (175gal):
FC: 2 (Strips)
PH: 8+ (6 Drops on the demand test)
TA: 125
CH: 250
CYA: 60
Temp: 100
I know my TA a little high on both, with kids splashing and just general use the pool will come down on it's own and for the hottub fixing the PH may bring that down some. Alright, where I need some help and advice. This is the first year I've cared about CYA in my hottub/pool. Before now I was using TriChlor in pool (Frog, I know boo-hiss!), and the CYA build up over the year was why I switched in the first place. I hadn't added any CYA to the hottub until now, because I had thought with it being a covered hottub, I didn't have to worry about losing chlorine to the sun. Lately I have been reading the CYA helps longevity of the SWG cells, and the Hayward manual says it's needed between 60-80, and TFP charts say 70-80. (Okay, okay, I get it! =P ) Using the CSI math and poolcalc, I'm trying to keep my CSI between .2 & -.2, per my Hayward manual -- largely using CH to give me some wiggle room.
Am I on the right path with CYA/CSI, that's something that's completely new to me. Second question, calculating how much Acid to put in for 6 drops on a 175gal tub. None of the charts go down that low. Also, I do plan adding Borates to get that silky smooth and PH stabilization I've been reading about.
Anything I'm missing or that might apply to my tub/pool?
Pool (7600gal):
FC: 10+ (Strips)
PH: 7.5
TA: 125
CH: 200
CYA: 50
Temp: 68
CSI: -.036
Spa (175gal):
FC: 2 (Strips)
PH: 8+ (6 Drops on the demand test)
TA: 125
CH: 250
CYA: 60
Temp: 100
I know my TA a little high on both, with kids splashing and just general use the pool will come down on it's own and for the hottub fixing the PH may bring that down some. Alright, where I need some help and advice. This is the first year I've cared about CYA in my hottub/pool. Before now I was using TriChlor in pool (Frog, I know boo-hiss!), and the CYA build up over the year was why I switched in the first place. I hadn't added any CYA to the hottub until now, because I had thought with it being a covered hottub, I didn't have to worry about losing chlorine to the sun. Lately I have been reading the CYA helps longevity of the SWG cells, and the Hayward manual says it's needed between 60-80, and TFP charts say 70-80. (Okay, okay, I get it! =P ) Using the CSI math and poolcalc, I'm trying to keep my CSI between .2 & -.2, per my Hayward manual -- largely using CH to give me some wiggle room.
Am I on the right path with CYA/CSI, that's something that's completely new to me. Second question, calculating how much Acid to put in for 6 drops on a 175gal tub. None of the charts go down that low. Also, I do plan adding Borates to get that silky smooth and PH stabilization I've been reading about.
Anything I'm missing or that might apply to my tub/pool?
