A waterfall adds oxygen to a
pond by creating a large surface area across which air can be absorbed into
the circulating water. simple fountain also adds large amounts of
oxygen to pond water. A fountain is cheaper than a waterfall.
Before buying any pump check
what the running cost will be. Look on pump box and if you can find watts
consumed multiply this by 8.76 and you will get units (kWhrs) of
electricity consumed every year by your pump. Go to your electricity bill
find cost per unit and you can work out running cost of the pump.If you can
only see amps on box you can work out watts as follows: amps x voltage of
mains supply = watts
In winter make holes in the ice
using pan full of hot water to remove toxic gases. Do not break the ice -
not good for the fish