What size is "medium"? You need to get an idea from a dealer (or their website), or someone already using one, what size pump you need for your pond and go from there. Modest domestic garden pond pumps are VERY roughly 100-200 watts.
h does electricity cost per kilowatt hour at wales?
A unit (as mentioned on the electricity bills) is represented in kWH or Kilowatt Hour. This is the actual electricity or energy used. If you use 1000 Watts or 1 Kilowatt of power for 1 hour then you consume 1 unit or 1 Kilowatt-Hour (kWH) of electricity.
To answer this question two more factors are needed. One is how long is the television on in a 24 hour period and the second is the amount that you pay per kilowatt hour on your electricity bill.
it saves electricity
14 electricity bolts per hour.
Measuring electricity usage.
The cost of electricity varies depending on the region if the country and the company owning the power supply. However, the average cost of electricity in the United States is about 12 cents per kilowatt-hour.
1,000 watts
1000
no that's not a lot
We celebrate earth hour to conserve electricity specially to save our mother earth.
Electricity consumption or, more accurately, energy consumption is measured in units called joules (J), although electricity supply companies use a bigger, non-SI, unit called the kilowatt hour. A kilowatt hour is defined as 'the energy consumer, over a period of one hour, at the rate of one kilowatt'.