Annual filter tear down and clean. Added 8lbs of DE.
Opened PoolCleaned Filter
Filter Pressure:
9
13.0
FC
0.0
CC
7.4
pH
70
TA
75 °F
TEMP
-0.42
CSI
52 oz of 31.45% (20º Be) Muriatic Acid
2 gal of Liquid Chlorine • 10%
0.6
FC
0.2
CC
7.9
pH
70
TA
75 °F
TEMP
0.06
CSI
5.5
FC
0.0
CC
7.8
pH
76 °F
TEMP
-0.11
CSI
Added 2oz of SKILL-IT to help clarify the water and kill some flying insects around the pool. Expect to see so FC due to that.
11.0
FC
0.0
CC
-0.23
CSI
1 gal of Liquid Chlorine • 10%
3.2
FC
0.2
CC
7.7
pH
60
TA
75 °F
TEMP
-0.23
CSI
7.5
FC
0.0
CC
-0.60
CSI
24 oz of TriChlor
1 gal of Liquid Chlorine • 10%
1.2
FC
0.0
CC
7.3
pH
60
TA
275
CH
50
CYA
900
SALT
0
BOR
75 °F
TEMP
-0.60
CSI
7.5
FC
0.0
CC
8.0
pH
60
TA
75 °F
TEMP
0.03
CSI
1 gal of Liquid Chlorine • 10%
PoolTime LC at Home Depot had manufacturing code 26015 (Jan 15) so the chlorine is 2 months and 6 days old.
$59.92 on Liquid Chlorine / Bleach • 10%
44 oz of 31.45% (20º Be) Muriatic Acid
9.0
FC
0.0
CC
7.8
pH
70
TA
72 °F
TEMP
-0.09
CSI
24 oz of TriChlor
1 gal of Liquid Chlorine • 10%
8.0
FC
0.0
CC
7.4
pH
60
TA
70 °F
TEMP
-0.57
CSI
1 gal of Liquid Chlorine • 10%
VacuumedBrushed
40 oz of 31.45% (20º Be) Muriatic Acid
2.2
FC
0.2
CC
7.9
pH
70
TA
70 °F
TEMP
0.00
CSI
New TF Testkit reagents.
3.6
FC
0.0
CC
7.8
pH
70
TA
50
CYA
66 °F
TEMP
-0.15
CSI
$75.20 on Test Kit Reagents
11.0
FC
0.0
CC
7.6
pH
70
TA
69 °F
TEMP
-0.34
CSI
2 gal of Liquid Chlorine • 10%
44 oz of 31.45% (20º Be) Muriatic Acid
0.6
FC
0.2
CC
7.9
pH
70
TA
68 °F
TEMP
-0.05
CSI
12.0
FC
0.0
CC
-0.28
CSI
2 gal of Liquid Chlorine • 10%
1.4
FC
0.2
CC
7.8
pH
60
TA
65 °F
TEMP
-0.28
CSI
4.2
FC
0.2
CC
7.8
pH
60
TA
59 °F
TEMP
-0.33
CSI
7.3
pH
50
TA
63 °F
TEMP
-0.89
CSI
40 oz of 31.45% (20º Be) Muriatic Acid
8.0
pH
-0.12
CSI
9.5
FC
0.0
CC
7.9
pH
60
TA
62 °F
TEMP
-0.22
CSI
20 oz of 31.45% (20º Be) Muriatic Acid
Brushed
Filter Pressure:
9.5
128 oz of Liquid Chlorine • 10%
3.6
FC
0.0
CC
8.0
pH
60
TA
60 °F
TEMP
-0.14
CSI
LC Strength Test - started at 2.6ppm FC and added 128fl oz of 10% LC (PoolTime brand from HD). FC increased to 9.0ppm after 1 hour.
9.0 - 2.6 =6.4 ppm
Expected effect of additions was 6.2ppm.
9.0
FC
0.0
CC
250
CH
800
SALT
58 °F
TEMP
-0.25
CSI
128 oz of Liquid Chlorine • 10%
2.6
FC
0.2
CC
7.8
pH
70
TA
57 °F
TEMP
-0.28
CSI
$48.00 on Liquid Chlorine / Bleach • 10%
CYA is roughly unchanged over 2 months (reading higher in fact now) which tells me there is definitely no leaks as it would have fallen. 50ppm to 60ppm consecutive readings isn’t odd given that the test easily has a +/- 15ppm tolerance and the water samples are different temperatures (20°F colder on the second read) .
5.5
FC
0.0
CC
7.6
pH
60
TA
60
CYA
56 °F
TEMP
-0.56
CSI
Dropped a block of dry ice (~ 1.5lbs) into the pool.
Closed Pool
Water temp is consistently below 60F and FC loss is less than 0.5ppm/day
128 oz of Liquid Chlorine • 10%
4.0
FC
0.0
CC
8.0
pH
60
TA
57 °F
TEMP
-0.14
CSI
128 oz of Liquid Chlorine • 10%
3.0
FC
0.0
CC
8.0
pH
60
TA
62 °F
TEMP
-0.09
CSI
64 oz of Liquid Chlorine • 10%
4.0
FC
0.5
CC
7.8
pH
60
TA
65 °F
TEMP
-0.25
CSI
64 oz of Liquid Chlorine • 10%
5.0
FC
0.0
CC
7.8
pH
60
TA
67 °F
TEMP
-0.24
CSI
7.0
FC
0.0
CC
7.2
pH
50
TA
74 °F
TEMP
-0.84
CSI
128 oz of Liquid Chlorine • 10%
40 oz of 31.45% (20º Be) Muriatic Acid
2.5
FC
0.0
CC
8.0
pH
60
TA
65 °F
TEMP
-0.06
CSI
96 oz of Liquid Chlorine • 10%
4.5
FC
0.0
CC
7.8
pH
60
TA
70 °F
TEMP
-0.20
CSI
32 oz of Liquid Chlorine • 10%
5.5
FC
0.5
CC
7.8
pH
60
TA
50
CYA
73 °F
TEMP
-0.19
CSI
8.0
FC
0.0
CC
7.7
pH
60
TA
74 °F
TEMP
-0.23
CSI
9.5
FC
0.0
CC
7.7
pH
60
TA
78 °F
TEMP
-0.20
CSI
2 gal of Liquid Chlorine • 10%
24 oz of TriChlor
9.0
FC
0.0
CC
7.8
pH
60
TA
74 °F
TEMP
-0.14
CSI
7.5
FC
0.0
CC
7.2
pH
50
TA
230
CH
77 °F
TEMP
-0.77
CSI
40 oz of 31.45% (20º Be) Muriatic Acid
64 oz of Liquid Chlorine • 10%
Just recorded a big drop in CYA, ~20ppm in 15 days. Very odd. But I have been noticing higher rates of FC loss and had measurable CCs a few days ago.
$81.42
on
Liquid Chlorine / Bleach
• 10%
16 oz
of
TriChlor
Opened Pool
Cleaned Filter
Vacuumed
Brushed
Closed Pool