chlorine disinfection

1:56

6:48

4:42

2:59

10:30

5:28

9:45

8:18

7:42

12:42

1:03:59

5:24

3:35

29:38

1:01

5:09

4:27

2:53

7:07

5:06

1:26:05

2:40

3:01

5:16

2:34

8:01

9:10

4:38

5:19

20:24

1:33:41

1:02

1:18

9:59

23:53

7:52

15:41

5:35

16:06

2:44

6:21

4:03

30:26

6:57

5:09

2:30

5:07

1:05:18

6:56

2:13

00:54

1:36

2:00

3:53

7:27

5:11

3:29

7:16

10:50

5:50