Water Gardening & Fishing: What Great Combination!

Pond Formulas

Here are a few simple formulas and conversions to help you plan your water garden. Formulas are approximate.



To Calculate Size of Pond Liner

Length = (Depth x 2) + Length + 3 feet

 

Width = (Depth x 2) + Width + 3 feet

 

Example: For a finished pond of 8' x 10' x 2.5', purchase a pond liner which measures at least 16' x 18'.

 

Length = (2.5 x 2) +10+3 feet = 18'

 

Width = (2.5 x 2) +8+3 feet = 16'



To Calculate Volume of Pond

(Use average measurements in feet)



Square or Rectangular shaped ponds

Length x Width x Depth x 7.48 = Pond Gallons

 

Example: 12' x 10' x 2' x 7.48= 1792.8 Gallons.



Circular shaped ponds

Radius= 1/2 of diameter

 

Area= Radius x Radius x 3.14

 

Volume= Area x Avg. depth x 7.5



To Figure Pump Requirements

Pumps should circulate the pond's water once every two hours at minimum. We recommend turning over the pond's volume once every hour.

 

Pond Volume / 2 = Pump Size

 

Example: 500 Gallon Pond /2 = 250 GPH Pump minimum.

 

Increase the pump requirement for water features such as fountains & water falls.



Tubing Flow Rates

Max Flow (GPH)
320
720
1,200
3,000
4,800
6,000
9,000
12,000
I.D. of tubing
1/2"
3/4"
1"
1.5"
2"
2.5"
3"
4"
Max Flow (GPM)
5
12
20
50
80
100
150
200


To Figure Electrical Consumption

Amps X Volts (110 or 220) = Watts

 

Watts /1000 = Kilowatts

 

Example: PondMaster 250 pump

 

24 watts/hr x 24 hours/day = 576 watts/day

 

Divided by 1000 = .576 kilowatts per day

 

x 30 days/month= 17.28 Kilowats/month

 

@10 cents KWH x 17.82 = $1.73 per month elect. cost



Metric Conversions

1 Teaspoon : = 5 ml

 

1 Tablespoon = 15 ml

 

1 US Gallon = 3.78 liter

 

GPH = U.S. Gallons Per Hour GPM = U.S. Gallons Per Minute

Copyright 2019 Center Point Pond. All Rights Reserved. Site Map | Terms + Conditions | Privacy Policy
1814 Valley Forge Rd, Worcester Twp, PA 19490
Phone: 610-222-9060

E-Commerce Development by Ryan Design Studio