Yes I broke the rule and put the first pond under the tree, but this has made a very natural pond which the local wild life seems to enjoy. This was dug into the bank and lined with a plastic liner. The surrounding garden is then allowed to hug to the waters edge.
With the liner under the soil on the waters edge marginal plants grow. Under the tree a large Gunnera (prickly rhubarb) offers dark shading with its large four to five feet leaves. On the far side of the pond is a clump of Acorus (Sweet Flag) its green leaves boldly stripped with cream.
Just to the left of the Gunnera water in trickles , on the opposite side the water begins its downward decent over a small waterfall in to the middle pond.
My brother decided on the location of the middle pond for this has gone in to the hole left by the stump of the cut down tree. The pond is lined with a plastic liner and edged with aged concrete blocks. on the fare side the blocks are inside the pond sloping down and away as if stratified. The blocks in the pond are dry laid with the gaps providing nooks and crannies for plants and wild life above and below the waterline. The pond is stocked with goldfish and shubunkins and frequented by the frogs and toads.
To ensure the stream does not dry up when there is no flow the stream has been constructed as three long thin pools each overflowing in to the next over a small rock outcrop.
There are no stock fish in the stream but the stream is a main event for the birds with its shallow edges ideal for the wash and brush up.
At the bottom is the more formal pentagonal pond by the patio, edged with a 'tight' formed blocks. On the patio side a wooden seat is set in to the edge.The pod is planted with water lilies and rushes. Here the larger fish swim including goldfish golden orfes, shubunkins and a couple of koi. The wild life keep clear of this pool
The water from the bottom pond overflows into a submerged storage tank from were it is pumped back to the top pond.