My 38 has several large rock caves. At each cleaning I move one to
clean under it and move the gravel around. It only takes a moment to
move one back and forth, and each cave gets the treatment every 5-6
weeks. In all it adds maybe 30 seconds to maintenance time.


ya i only have 3 pieces but they are over 25 and 30 inches, and they
interlock. so to remove the top piece i may as well move the other 2.
and i can't move the side pieces without removing the top piece.

btw what are your caves, are there pics, are they commercial things.
and if you have a 38(gall/litres), how do you fit so many caves in
there?