sl wrote:
i have 2 20lb or more bogwood, and rock, set up as a cave. now do i
want to disturb this formation on a monthly basis to vacuum, or just
vacuum around it? or maybe move it every 6 months or so. the tank is
too small to move the stuff to a different location. thoughts? it is
an oscar tank

One thing I've heard for dealing with rockwork is to direct a jet of water
into the structures to stir things up and off of the rocks. A powerhead or
Python would do the trick. This doesn't help with anaerobic conditions in
the substrate, but does help remove some of the mulm that settles into the
rocks and such itself.