The Water Butt does the job. Its Slimline footprint fits perfectly into the space. A major modification is required however. The planters fill up with rainwater. They cannot be removed. They need to be drained. DO NOT remove the plastic plugs, the tank will fill with derbris. Draining the Planters is done by using 22mm overflow pipe. There's no stand available so it's necessary to fabricate your own.
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