Same here actually. But let me show a photo.
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Smaller tank was made higher with a block concrete, you can fill with sand and compact to save cost
This will work if you ba k of the garden isn't too much higher.
I definitely need a pump. My pool / garden is around half a meter higher than house. There'a zero chance water will run upwards on its own there. But, to be fair I am OK with two 5kL tanks on the side of the property. that area is "dead space" anyway.
I'll start off with a single 5000 L tank and go from there. Just need to figure out placement, pump mounting and such.
