1.
To Find The Volume Of Your Pond.
Rectangular:
Length
x Breadth
x Depth - In metres
If Sloping floor take the median depth.
Circular:
½ Diameter x ½ Diameter x Depth x 3.142. in metres
To convert to litres.
1 Cubic Metre = 1,000 litres = 1 Tonne Of Water.
Odd Shaped Ponds.
Set the hose and time the water into something like a garbage can of known volume.
Time to fill will represent this much volume.
Time (T) needed to fill pond divided by the basic unit (BU)
Will give the volume. T divided by BU = V.
Or Check water meter reading before and after filling pond.
Then take first reading from second reading. Eg First reading 322476 after filling 328971
328971 – 322476 = 6495 litres ( On some meters the last digit is tenths of a litre)
You now have the number of litres in you pond.
2.
To Find The Surface Area Needed For A Gravel Media
Filter.
| Ideal Flow Rate = 30 litres/M2/Minute. | |
| Minimum Daily Turn Over Of Water. | |
| 3 Times Per 24 Hours. | i.e. Every 8 Hours. |
| Ideal Rate. 6 Times. | i.e. Every 4 Hours. |
| Pond Capacity. | 24,000 litres. |
| Hourly Turn Overrate. | 6000 litres. |
| Turn Over Per Minute. | 100 litres. |
| 100 divided by 30 = | 3.333 |
| Therefore Surface Area Of Filter | 3.3m2 |
3. To Convert
Useful Imperial Measures To Metric.
| 100 Galls. = | 450 Litres |
| 1,000 Galls. = | 45,000 Litres |
| Household Bucket. = | 10 litres (2 ½ Gallons ) |
4. Useful Oddments
| 1 ml of water weighs 1 Gram | |
| Metric Teaspoon = | 5ml |
| Metric Tablespoon = | 10ml |
| Metric Cup = | 250ml |
5.
Medicinal Dosages.
| 1 P.P.M. = | 1 part per million |
| = | 1 milligram per litre |
| = | 1 gram per 1,000 litres |
| 10% With Water. | 90% + Water + 10% Medication |
|
10% In Water. |
100% Water + 10% Medication |
6.To
Weigh Large Fish.
| Catch In Plastic Bag. - Weigh | |
| Pour Off Water And Measure | 1 ml = 1 gm |
| Subtract And Answer Is Weight Of Fish |
Extracts for "Keeping Koi in Australia"