Figuring out what you need to build your pond is an important factor to determine it’s cost and efficiency. The following guidelines should help you. Ask for help at **thepondpad@gmail.com**

** How to Estimate Gallon Capacity
**

**Circular Pond:*** R2 x 3.14 x Depth x 7.48 = Approx. Gal. R2= Radius x Radius (Radius is ½ of the total length)*

**Irregular /Rectangular Pond:*** Length x Width x Ave. Depth x 7.48= Approx.Gal.*

* Irregular Pond w/shelves: Length x Width x Depth x 7.48 x .66= Approx. Gal.*

**Streams***: Length x Width x .25 (Depth) x 7.48= Approx.Gal.*

**How to Calculate Pond Liner Size.**

**Length***= Length + (Depth x 2) + 2 ***Width***= Width + (Depth x 2) + 2*

*Example: 8 x 10, 2′ deep L= 10′ + (2×2) + 2= 16′ W= 8′ + (2×2) + 2= 15′ *

** Electrical Conversions / Consumption**

*WATTS= Volts x Amps AMPS= Watts / Volts 1HP= 745.7 Watts *

**Approximate Electrical Cost to run a pump, etc.**

*Amps x Volts x 1000 x .10(KW per hour) x 24hrs x 30.4 days=$ / month*

** Aquatic Plant Calculations**

*Water Lilies: 1 per every 45-60 Sq F *

*Marginal Plants: 1 plant per every 3′-4′ shelf margin*

*Bog Plants: 1 plant for every 2′ of bog *

** Rock Calculations- For Gravel & Boulder***s*

**Boulders for Pond Basin:**

*Length x Width / 65 Tons of Boulders Use a 1:2:1 ratio*

*For every 1 Ton of 6”-12” rock; get 2 Tons of 12”-18” and 1 Ton of 18”-24” rock*

*½ Ton of 6”-12” of rock will cover 20 linear feet *

*1 Ton of 12”-18” of rock will cover 10 linear feet *

*1 Ton of 18”-24” rock will cover 5 linear feet*

**Boulders for Stream***– For every 10′ of Stream, Use 3/4 Tons of rock using ratio above.*

**Boulders for Waterfall***– Use 1 Ton of rock per each 3′-4′. Choose some larger stones for support, and some rocks with flat or interesting faces for the waterfall.*

**Gravel for Pond Basin***– Use 40% total tons used for pond boulders calculations*

**Gravel for Streams***– Use ½ Ton for every 10′ of stream*

**Pondless/ Disapearring Waterfall***– Length x Width x Depth = Cubic feet*

*Use 90lbs of rock per each cubic foot; Use Ratio of: 40% 4”-6” Rock*

*(for the bottom of the basin) and 60% of 1 1/2” – 2” rock (for middle and top layer). Add decorative gravel / rock as a top dress.*

*These are guidelines to help you, always over estimate whenever possible. Any left over rock can be blended into your surrounding landscape.*

**www.alpinegrows.com**** www.thepondpad.com**