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Something like this could "frame" the koi pond.
From the inside looking out.
Rain curtain effect.
A very thin version of this rain wall (think four inch square metal frame) could be used to "frame" the koi pond and create a neat look.
Another example of water raining down into pool that would be a neat effect for the koi pond.
Would want to make sure the water falls more evenly than this.
Wood platforms.
Steps
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