Great thread and insights!
You should write a book on the subject

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I am currently cycling my 910L reef and the aquascape is a very important factor for me and the end result.
- All equipment and pumps have been placed behind a wall of reef ceramics on the right side to avoid visual interference. This also creates a dramatic reef wall going up to the surface of the tank. From the right side I have then made the other parts progressively smaller towards the left side and I will have this in mind when the corals grow.
- For the middle part I have tried to make a spiral formation that moves in a circular and upward movement. This is a bit hard to see in the photos but I think it will look good with the right corals/planning/trimming.
- On the left side I have tried to resemble the vertical islands seen outside Thailand for example and also try to add visual depth by placing a smaller rock in the foreground (the plan is for this rock to be covered in ricordea later for the size to remain small).
To add interest and improve circulation and hiding spots for the inhabitants I have chiseled out several kg of rock to make caves that run through the rocks. This also adds visual depth to the scene and a three dimensional feel to it (also hard to see in the photos). I have also added shelves to some of the rocks but these will likely be removed later when the corals have grown to avoid a cramped impression.
I will try to keep the sand free of corals to keep the open spaces ... open

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I would highly appreciate feedback and pointers from you guys at this stage and look forward to more inspiration in this thread.
Greetings from Finland.