I leave space partially so fish have more room to swim behind the rockwork, and partially to be able to clean the glass. Mostly that second one.
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I this adds so much to how the fish are able to swim, I even mounted a large mirror behind my tank. Now I’m able to see action taking place back there. And no the fish don’t appear to be able to see there reflections, could be the 8” space between the tank and the mirror.I think flow and removing dead spots are both good reasons to keep some space. But I also just prefer it aesthetically. I like seeing the fish swim throughout the entire rock structure. I also like having the other side to look at sometimes. Or at least down from the side.
wow that's beautifulWell that depends on your scape.
I have always had the great rock wall. I have a minimalist scape with 3-4" between the rock and the back wall. This allows swimming room for fish and makes detrius removal easier on my bare bottom.
However as the tank grows in corals are encroaching on the back glass. It wont be long before several attatch to the back.
The back is difficult to access now but powerheads keep the area free of detrius for now.
1.5 years aho and now.
Thank you! Their are pics from day one until now in my build thread.wow that's beautiful