- Nov 15, 2018
- 188
- Pool Size
- 19000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Monarch ESC24 / ESC7000
Details in sig, but fibreglass pool, sand filter, single speed pump and SWG that can make 1.2ppm/hr (itty bitty pool)
CYA - 70
Salt - 4600
CH - 260
TA - 100
pH - 7.8
Borates - 55
CC - 0
FC - 20
The FC is high because the kids left the filter on and at 1.2ppm/hr it gets up fast. Because I've not been present reliably I've set it up so the FC never drops below 10. Daily tests at worst-case time (sunset on a hot day with no filtering during daylight hours) confirm this.
The pool passes the OCLT. The water is crystal clear but goes a little bit cloudy after swiming and requires an extra couple of hours filtering to clear back up. Filter pressure is rising.
It has all the hallmarks of Algae, but it's not really consuming chlorine and the FC level has never dropped below 10.
I know it's not right as last summer I never had to backwash the filter and it never clouded up.
I tried a SLAM in October and it ticked all the boxes after a single day, so I let it run for 3 days just to be sure.
Now, I topped up the salt, borates & CYA a couple of months ago (winter rain washout). Salt and borates pre-SLAM and CYA post. I haven't added acid since Feb and I've only used 12% liquid chlorine for the SLAM. Our water temp never drops to where the SWG isn't effective, so it kinda maintains itself most of the year. pH likes to sit between 7.4 & 7.8 but our tap water has a TA of > 110 so it does creep up over summer and require the odd adjustment.
No sign of green anywhere (it usually pops up on the wall in the shade if it's coming). So I'm a bit baffled. The rising filter pressure tells me something is wrong, but I would have though the cloudy after a swim would point to algae. But at an FC of 20ppm?
CYA - 70
Salt - 4600
CH - 260
TA - 100
pH - 7.8
Borates - 55
CC - 0
FC - 20
The FC is high because the kids left the filter on and at 1.2ppm/hr it gets up fast. Because I've not been present reliably I've set it up so the FC never drops below 10. Daily tests at worst-case time (sunset on a hot day with no filtering during daylight hours) confirm this.
The pool passes the OCLT. The water is crystal clear but goes a little bit cloudy after swiming and requires an extra couple of hours filtering to clear back up. Filter pressure is rising.
It has all the hallmarks of Algae, but it's not really consuming chlorine and the FC level has never dropped below 10.
I know it's not right as last summer I never had to backwash the filter and it never clouded up.
I tried a SLAM in October and it ticked all the boxes after a single day, so I let it run for 3 days just to be sure.
Now, I topped up the salt, borates & CYA a couple of months ago (winter rain washout). Salt and borates pre-SLAM and CYA post. I haven't added acid since Feb and I've only used 12% liquid chlorine for the SLAM. Our water temp never drops to where the SWG isn't effective, so it kinda maintains itself most of the year. pH likes to sit between 7.4 & 7.8 but our tap water has a TA of > 110 so it does creep up over summer and require the odd adjustment.
No sign of green anywhere (it usually pops up on the wall in the shade if it's coming). So I'm a bit baffled. The rising filter pressure tells me something is wrong, but I would have though the cloudy after a swim would point to algae. But at an FC of 20ppm?