POND PUMPS:

 

At the heart of most ponds lies a submersible pump.  The pump typically operates 24 hours a day throughout the water gardening season.  Not only does the pump aerate and circulate water, but it is the power behind such features as a fountain, stream, waterfall, filter and ultra violet clarifier.

 

A submersible pump has either a direct or magnetic drive.  A direct-drive pump is more powerful in terms of the height and length it can push water.  This type of pump costs a little more to operate, but is the best choice for a large pond, waterfall, filter system, or stream. 

 

A magnetic-drive pump is lower wattage and therefore energy efficient.  Although it lacks the power of a direct-drive pump, it is well suited to a small or medium sized pond, fountain, waterfall, or simple water circulation and aeration.

 

There are two acceptable methods used to determine the right sized pump for a pond:

 

1.            one is based on circulation and the number of fish in the pond; and

2.           the other is based on the power required for a water feature.

 

In both cases, the volume of the pond needs to be calculated.  Use the following formula to calculate pond volume in US gallons.  For all shapes, the dimensions should be in feet.

 

Rectangular pond = length x width x average depth x 7.48 x 80%

Circular pond = diameter x diameter x average depth x 5.9 x 80%

Irregular pond = length x width x average depth x 6.9 x 80%

 

1.            If the only function of the pump is to circulate and aerate water for a large number of fish, then calculate the volume of your pond, and select a pump that will circulate 100% of the volume per hour.

Example:

 

VOLUME of a rectangular pond (9ft x 8ft x 2.5ft):

 

9 x 8 x 2.5 x 7.48 x 80% (rectangular multiplier) = 1,077 US gallons

 

CORRECT PUMP SIZE (allow 100% circulation) = 1,100gph

 

2.           If the function of the pump is to power a waterfall, filter, UVC, etc., then select a pump powerful enough to give the desired flow rate at a calculated height (vertical lift or head).  In this case, select a pump that can circulate up to 250% of the volume per hour.

 

To determine the correct size of pump for a waterfall or stream:

 

measure the width at the top of the waterfall and/or stream in inches;

select the desired water thickness from the chart below; and

apply the appropriate formula (see table below).

 

THICKNESS

FORMULA

Trickle

¼“ thick water

allow 62gph per inch of waterfall width; calculate tubing friction; calculate pressure friction; and add vertical and friction heads together to find total dynamic head (TDH)

Curtain

½“ thick water

allow 125gph per inch of waterfall width; calculate tubing friction; calculate pressure friction; and add vertical and friction heads together to find total dynamic head (TDH)

Splashing

1“ thick water

allow 186gph per inch of waterfall width; calculate tubing friction; calculate pressure friction; and add vertical and friction heads together to find total dynamic head (TDH)

Standard Stream

allow 125gph per inch of stream width, calculate tubing friction; calculate pressure friction; and add vertical and friction heads together to find total dynamic head (TDH)

 

Try not to circulate more than 2.5 times the pond’s volume in one hour.

 

Example 1:  Pond volume is 2,500 US gal, 3’ high waterfall, 20’ x 1.5” hose, a biofilter, a 24” spillway.  (Friction loss = pressure, static and tubing friction) (TDH) = 11.5ft)

 

 

GPH required for waterfall

Pond Volume

Waterfall

TDH

Gentle Falls

Standard Falls

Splashing Falls

3,000 US gallons

23ins wide

11.5ft

1,488gph

3,000gph

4,464gph

 

AquaForce Pump Size @ 11.5ft lift

2,700gph

3,600gph

5,200gph

 

Example 2:   Pond volume is 2,500gph, stream is 15’ long x 2’ wide x 3” deep, splashing header waterfall 3’ high, a biofilter, 24” spillway and 25’ x 1.5” hose.  (Friction loss = pressure, static and tubing friction) (TDH) = 15.75ft)

 

Waterfall = 24ins wide x 186gph = 4,464gph (recommended flow rate)

 

Static Friction = 3ft (vertical lift)

Tubing Friction = 25ft (hose) x 0.43 = 10.75ft

Pressure Friction = 2ft (biofilter + stream)

 

Minimum pump size equals the volume (2,500 US gallons) plus TDH.  The pump must be capable of pumping 4,464gph (waterfall) after allowing for 15.75ft TDH.

 

 The correct OASE pump size will be around 8,000gph.

 The correct Aquaforce pump size will be the adjustable 4,000-8,000gph.

 

When buying a pump, it is better to oversize than to undersize.

 

AQUASCAPE

 

AquaForce Solids-Handling Pond Pumps

 

Solids handling; extremely energy efficient; asynchronous motor; easy maintenance; durable pre-filter cage; oil free; plumber adapter fittings included; 25ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

1000

55

¾” – 1½”

1070

10ft

$3.35

$249.99

1800

160

¾” – 1½”

2149

16.5ft

$9.73

$299.99

2700

147

¾” – 1½”

2695

14ft

$8.82

$349.99

3600

215

¾” – 1½”

3868

18ft

$13.07

$399.99

5200

360

¾” – 1½”

5284

24ft

$21.89

$529.99

 

 AquaForce 4000-8000 Adjustable Flow Solids Handling Pond Pump

 

Solids handling; energy efficient; adjustable flow rate; wireless remote and receiver (paired); adapter fittings included; pre-filter cage; oil free; 20ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

PRO 4000-8000

500-660

¾” – 1½”

7793

28ft

$30-$40

$869.99

 

AquaSurge Skimmer and Pondless Waterfall Pumps

 

Energy efficient; asynchronous motor; oil free; vertical or horizontal

operation; adapter fittings included; 20ft power cord.  Use only in skimmer or pondless installations.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

2000

160

¾” – 1½”

2193

12.5ft

$9.73

$399.99

3000

165

¾” – 1½”

3196

15ft

$10.03

$479.99

4000

215

¾” – 1½”

3947

18.5ft

$13.07

$549.99

5000

360

¾” – 1½”

5284

24ft

$21.89

$599.99

 

AquaSurge PRO Adjustable Flow Pumps

 

Energy efficient; adjustable flow rate; wireless remote control and receiver are paired together; adapter fittings included; 20ft power cord.  Use only in skimmer or pondless installations.

 

Model

Watts

Hose

gph

Lift

Cost/Month

Price

PRO 2000-4000

180-215

¾” – 1½”

3947

18.5ft

$11-$13

$699.99

PRO 4000-8000

500-660

¾” – 1½”

7793

28ft

$30-$40

$869.99

 

AquaSurge Low Suction Intake Attachment

(not compatible with 4000-8000) - $25.99

 

Aquascape Ultra Pump

 

Extremely energy efficient; magnetically driven; pre-filter; oil-free;

fittings included; 25ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

800

58

½” - 1¼”

793

9ft

$3.65

$164.99

 

ATLANTIC

 

Atlantic TW Tidalwave 2 Pumps

 

Energy efficient; low maintenance; asynchronous motor; compact; replaceable impeller; hose adapters included; 32ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

TW1200

110

1½”

1290

16ft

$6.68

$239.99

TW1900

130

1½”

1900

18ft

$7.90

$269.99

 

LITTLE GIANT

 

Little Giant Direct Drive Pumps

 

Energy efficient; compact design; epoxy encapsulated; 15ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

PE-1F-WG

36

½”

170

7ft

$2.19

$96.99

PE-2F-WG

47

½”

300

12.2ft

$2.74

$135.99

PE-2.5F.WG

80

¾”

475

13.4ft

$4.86

$175.99

 

OASE

 

Aquarius Universal Fountain Pumps

 

Energy efficient; continuous operation; inline capable; quiet; flow control; compact; 3yr warranty upon product registration; 16ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

800

60

½”-1”

800

9.9ft

3.90

$109.99

1400

80

½”-1”

1400

10.2ft

4.86

$159.99

 

Fountain Pumps

 

Energy efficient; compact design; flow control; suction cups on feet; 3yr

warranty upon product registration; 6ft-16ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

90

4

½”

90

2.8ft

30c

$24.99

150

7

½”

150

3.6ft

45c

$29.99

320

23

½”

320

6.2ft

$1.52

$39.99

525

42

½”

525

7.9ft

$2.43

$54.99

 

Pond Pump

 

Energy efficient; compact design; flow control; epoxy encapsulated; 3yr

warranty upon product registration; 16ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

575

68

¾”

575

13.5ft

$4.26

$119.99

 

Waterfall Pumps

 

Energy efficient; easy maintenance; solids handling (1/6”);

3yr warranty upon product registration; 20ft power cord.

 

Model

Watts

Hose

gph

Lift

Cost/Mnth

Price

1650

70

1¼”

1650

16.5ft

$4.40

$179.99

3700

170

1½”

3700

21ft

$10.34

$299.99

5150

230

2”

5150

23ft

$13.98

$329.99

6600

460

2”

6600

26.5ft

$27.97

$499.99

 


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