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Flow -vs- Time Chart – Using the 5 gal Bucket Method

By Ron Boedeker

 

It is difficult to "eyeball" the amount of water passing through a pump, bio filter, or waterfall. Because these flow rates are often critical to the well-being of a pond, it becomes necessary to accurately measure these quantities. By measuring the amount of time required to fill a five gallon bucket, an accurate flow figure can be established.

 

The following table shows the correlation between the amount of time required to fill a five gallon bucket and the total Gallons Per Minute (GPM) and Gallons Per Hour (GPH) figures.

 

 

Secs

Gals/Min

Gals/Hr

1

300

18,000

2

150

9,000

3

100

6,000

4

75

4,500

5

60

3,600

6

50

3,000

7

43

2,570

8

37.5

2,250

9

33.3

2,000

10

30

1,800

15

20

1,200

20

15

900

25

12

720

30

10

600

35

8.6

515

40

7.5

450

45

6.7

400

50

6

360

55

5.5

325

60

5

300

70

4.3

257

80

3.75

225

90

3.33

200

100

3

180

150

2

120

200

1.5

90

300

1

60

 

 

 For questions or for more information contact: Ron.koi@charter.net