Quote:
pondseeker wrote:
My query is as it is 4ft deep with a flat bottom is it possible to put a fountain in the pond without building a central base before inserting the liner.
Yes.
Pity its not that simple.

You can have a fountain in the middle of your pond but if you build a "tower" first then put the liner over the top you will need to buy a much bigger liner to allow for the "tower" and you also stand a very good chance of tearing the liner on the "tower" Also, the question is, how tall will you build this "tower" You can not say until you have decided on which pump you are going to use. (Then you can find the measurements of this pump with its nozzle fitted, and build a tower to the correct height.)
It would be much easier to build the "tower" on the liner and put a fountain pump on top of the "tower" You put an off cut of liner on the main liner, then build your main tower on this. (Its easier, less hassle and adjustable.)
You should also be aware that your tower can not be cemented together unless you wait for it to dry and then seal the cement, the reason is the cement contains lime which will upset the ph of your pond, and as a result may kill any fish.
FilterI have to ask, what are you doing in respect of filtration?
I would ask that you read the information on the following link
CLICK HEREMore things I feel I should point out.Having a fountain in a pond is good, in summer it aerates the water, but what about at night? it "becomes noisy" Simple, turn it off. Sorry can't do that

, the pump for the fountain is the same one that supplies the filter. The answer is simple, two pumps, one for the filter and one for the fountain.
There is a difference between a fountain pump and a filter pump. In short a filter pump can move solids and a fountain pump can't. More information can be found if you
CLICK HEREFountain height.As your pond will be just over 3 feet wide, your fountain jet can can only be 18 inches tall at most, any more you run the risk of emptying the pool. To find out more
CLICK HERE Pond volumeYou do need to know the pond volume to decide which filter and pump you need. You said its about 540 gallons. If you use the calculator to the right, you will see your pond is only 445 gallons (You can buy a smaller pump and filter now)

Any questions /anything you are not sure of, please ask.