Gallons of Water

and Pumps

Use this chart to figure how many effective gallons of water you have in your pond.  The effective gallons of water will tell you what size pump you will need.

 

Number of Gallons of physical water in a pond equals:

 

Length x Width x Depth x 7.48 Gallons per square foot

 

Example: 8’ x 10’ x 2’ x 7.48 = 1196.8 gallons

                160 sq. ft. x 7.48 = 1196.8 gallons

 

The presence of the following factors will increase effective water

volume by 25% each.

FISH- Increase effective water volume by 25%.

PLANTS- Increase effective water volume by 25%.

WATERFALLS/SPITTERS- Increase effective water volume by 25%.

SHALLOW WATER DEPTH (< 2’ 6”)- Increase effective water volume by 25%.

FULL SUNLIGHT- Increase effective water volume by 25%.

LENGTH of Pond

WIDTH  of Pond

DEPTH   of Pond

PHYSICAL GALLONS WATER

EFFECTIVE GALLONS OF WATER

WITH PLANTS    OR FISH

WITH FISH AND PLANTS

WITH SPITTERS, WATERFALLS, PLANTS & FISH

SHALLOW WATER WITH FALLS PLANTS & FISH

FULL SUN W/FALLS, PLANTS & FISH

8

10

1.5

898

1122

1346

1571

1795

1795

8

10

2

1197

1496

1795

2094

2394

2394

8

10

3

1795

2244

2693

3142

3590

3590

10

10

1.5

1122

1403

1683

1964

2244

2244

10

10

2

1496

1870

2244

2618

2992

2992

10

10

3

2244

2805

3366

3927

4488

4488

10

15

1.5

1683

2104

2525

2945

3366

3366

10

15

2

2244

2805

3366

3927

4488

4488

10

15

3

3366

4208

5049

5891

6732

6732

10

20

1.5

2244

2805

3366

3927

4488

4488

10

20

2

2992

3740

4488

5236

5984

5984

10

20

3

4488

5610

6732

7854

8976

8976

15

15

1.5

2525

3156

3787

4418

5049

5049

15

15

2

3366

4208

5049

5891

6732

6732

15

15

3

5049

6311

7574

8836

10098

10098

20

20

1.5

4488

5610

6732

7854

8976

8976

20

20

2

5984

7480

8976

10472

11968

11968

20

20

3

8976

11220

13464

15708

17952

17952

A RULE OF THUMB IS THAT THE EFFECTIVE AMOUNT OF WATER MUST BE TURNED EVERY TWO HOURS

EFFECTIVE FLOW PER HOUR

X (2) HOURS

RECOMMENDED PUMP SIZE

HOSE SIZE

FILTER RECOMMENDED

200 GALLONS

400 GALLONS

NPU 200

1/2 "

BIOFORCE 250

BIOFORCE 250 UVC

350 GALLONS

700 GALLONS

NPU 350

3/4 "

BIOFORCE 500

BIOFORCE 500 UVC

500 GALLONS

1000 GALLONS

NPU 500

3/4 "

BIOFORCE 500

BIOFORCE 500 UVC

750 GALLONS

1500 GALLONS

NPU 750

3/4 "

BIOFORCE 1000

BIOFORCE 1000 UVC

1000 GALLONS

2000 GALLONS

NPU 1000

3/4 "

BIOFORCE 1000

BIOFORCE 1000 UVC

1250 GALLONS

2500 GALLONS

NPU 1250

1 "

BIOFORCE 1000/2000

BIOF. 1000/2000 UVC

1800 GALLONS

3600 GALLONS

NPU 1800

1 "

BIOFORCE 2000

BIOFORCE 2000 UVC

2000 GALLONS

4000 GALLONS

NPU 2000

1 1/4 "

BIOFORCE 2000

BIOFORCE 2000 UVC

3000 GALLONS

6000 GALLONS

NPU 3000 OR EBARA 3000

1 1/4 "

SKIMMER SYSTEM W/STERILIZER

4000 GALLONS

8000 GALLONS

NPU 4000 OR EBARA 3000

1 1/4 "

SKIMMER SYSTEM W/STERILIZER

5000 GALLONS

10000 GALLONS

NPU 5000

1 1/4 "

SKIMMER SYSTEM W/STERILIZER