Pool is clear and sparkling. Added 1.25 cups of D.E. to skimmer basket anyway for good measure.
128 oz of Liquid Chlorine • 10%
3.0
FC
0.0
CC
7.5
pH
9.2
FC
0.2
CC
84 °F
TEMP
6.5 oz of 53% Cal-Hypo
4.0
FC
0.2
CC
7.5
pH
80
TA
2 gal of Liquid Chlorine • 10%
11.0
FC
0.2
CC
7.8
pH
84 °F
TEMP
2 lbs of 53% Cal-Hypo
9.0
FC
0.2
CC
7.7
pH
32 oz of 31.45% (20º Be) Muriatic Acid
11.2
FC
0.2
CC
8.4
pH
90
TA
80
CH
50
CYA
5
BOR
84 °F
TEMP
293 oz of Liquid Chlorine • 10%
13 oz of 53% Cal-Hypo
2.0
FC
0.0
CC
7.8
pH
90
TA
89 °F
TEMP
66 oz of Liquid Chlorine • 10%
3.8
FC
0.0
CC
89 °F
TEMP
15 oz of 53% Cal-Hypo
1.4
FC
0.2
CC
7.6
pH
90
TA
70
CH
50
CYA
87 °F
TEMP
62 oz of Liquid Chlorine • 10%
2.4
FC
0.2
CC
7.6
pH
12 oz of 53% Cal-Hypo
2.4
FC
0.2
CC
7.6
pH
50
CYA
86 °F
TEMP
8.1 oz of 53% Cal-Hypo
2.2
FC
0.0
CC
7.6
pH
90
TA
60
CH
40
CYA
400
SALT
5
BOR
88 °F
TEMP
16 oz of 53% Cal-Hypo
1.4
FC
0.2
CC
7.6
pH
88 °F
TEMP
16 oz of 53% Cal-Hypo
Backwashed
Filter Pressure:
20
Flow Rate:
16
2.0
FC
0.2
CC
7.6
pH
50
CYA
82 °F
TEMP
55 oz of Liquid Chlorine • 10%
3.0
FC
0.0
CC
7.6
pH
81 °F
TEMP
17 oz of 53% Cal-Hypo
0.8
FC
0.2
CC
7.6
pH
81 °F
TEMP
6.0
FC
0.2
CC
88 °F
TEMP
14 oz of 53% Cal-Hypo
2.6
FC
0.2
CC
7.4
pH
90
TA
50
CH
50
CYA
0
SALT
5
BOR
88 °F
TEMP
Backwashed
Filter Pressure:
20
Flow Rate:
16
16 oz of 53% Cal-Hypo
17 oz of Dry Stabilizer
2.4
FC
0.2
CC
7.6
pH
85 °F
TEMP
16 oz of 53% Cal-Hypo
1.8
FC
0.2
CC
7.6
pH
50
CYA
84 °F
TEMP
13 oz of 53% Cal-Hypo
2.0
FC
0.2
CC
7.6
pH
84 °F
TEMP
12 oz of 53% Cal-Hypo
2.4
FC
0.2
CC
7.6
pH
80
TA
84 °F
TEMP
Backwashed
Filter Pressure:
20
Flow Rate:
16
Added 1.5 cups of DE to the skimmer basket; filter pressure remained at 16 PSI.
52 oz of Liquid Chlorine • 10%
2.8
FC
0.2
CC
7.7
pH
85
TA
30
CH
50
CYA
0
SALT
5
BOR
84 °F
TEMP
Backwashed
Filter Pressure:
20
Flow Rate:
16
Added 3 cups of DE to the skimmer basket; filter pressure went from 16 to 17 PSI.
3.6
FC
0.2
CC
7.7
pH
90
TA
30
CH
50
CYA
0
SALT
5
BOR
86 °F
TEMP
49 oz of Borax (20 Mule)
24 oz of Liquid Chlorine • 10%
2.6
FC
0.0
CC
7.2
pH
80
TA
30
CH
50
CYA
0
SALT
5
BOR
86 °F
TEMP
90 oz of Baking Soda
60 oz of Borax (20 Mule)
2.8
FC
0.2
CC
6.8
pH
30
TA
30
CH
40
CYA
0
SALT
5
BOR
85 °F
TEMP
34 oz of Dry Stabilizer
65 oz of Liquid Chlorine • 10%
1 gal of Liquid Stabilizer
Removed old sand and cleaned out filter, lateral assembly, and multiport valve. Also cleaned out pump filter basket, housing, and lid. Removed some excess/squeeze-out silicone lubricant on pump basket lid and multiport valve.
Added 150lbs of new pool filter sand to filter and rinsed with hose until it all particles spilled out of the top and the water ran clear.
Set the multiport valve to Waste Out and reinstalled it on the sand filter. Filled the pump filter housing and dropped in the basket and installed the lid. Reconnected the plumbing and opened the skimmer and return valves.
Turned the pump on and let it run on Waste Out to clear the inlet line and valve and made sure the water at the end of the backwask hose was clear. Set it to Backwash and let that run for approx 3 mins, then Rinse for another minute.
Set the pump to Filter and will let it run this way continuously for a day or two, then will set it to run on a schedule depending on water quality/clarity, bather load, and frequency of backwashing.
Opened PoolBackwashedCleaned Filter
Filter Pressure:
16
Flow Rate:
16
0.2
FC
0.0
CC
7.4
pH
30
TA
30
CH
0
CYA
0
SALT
5
BOR
80 °F
TEMP
Complete drain and refill
1 gal of Liquid Chlorine • 10%
Backwashed
Filter Pressure:
20
Flow Rate:
16
3.0
FC
0.2
CC
7.4
pH
85
TA
140
CH
25
CYA
1000
SALT
10
BOR
75 °F
TEMP
Filter Pressure:
16
9.4
FC
0.6
CC
7.5
pH
90
TA
140
CH
30
CYA
1000
SALT
10
BOR
80 °F
TEMP
134 oz of Liquid Chlorine • 10%
5.8
FC
0.4
CC
7.5
pH
78 °F
TEMP
Backwashed
Filter Pressure:
20
Flow Rate:
16
2 gal of Liquid Chlorine • 10%
0.8
FC
0.4
CC
7.5
pH
90
TA
140
CH
35
CYA
80 °F
TEMP
Checked the condition of the sand. It felt a lot better and squeezing it didn't leave a sticky residue on my hand. I ran the hose down into the filter for around 30mins, prodding it around to agitate the sand and watched it until the majority of fine silt-like particles floated up and out of the top. I reinstalled the multiport valve and connections, then ran the pump while in backwash mode until the water in the sightglass looked as clear as it could.
Opened the sand filter and found the sand to visually look normal and relatively clean, but after grabbing some with my hand I found that it left a very sticky residue (biofilm/body-oil? flocculent/clarifiers? silicone lubricant?) on my hands.
Drained all of the water from the filter with the help of the wet vac on the winter drain. Replaced the winter drain cap, mixed a full bottle of filter cleaner with approx 5gal of water, enough to cover the top of the sand, and poured it in. Let this sit overnight for 10-12hrs. Will check condition of sand tomorrow. If still sticky, I will just replace the sand.
Added 16oz of Rapid Rinse Filter Cleaner very slowly to skimmer basket during backwash.
BackwashedCleaned Filter
Filter Pressure:
19
Flow Rate:
16
Added 1 cup of DE (disolved in water) slowly to skimmer basket.
Added 5oz of Super Concentrated Water Clarifier (diluted in water) to pool water in front of return
3 gal
of
Liquid Chlorine
• 10%
Backwashed
Opened Pool
Cleaned Filter