If you are using LR in the aquarium,
it is best to
elevate
the rocks off the bare bottom of the tank. Many marine animals burrow
into the sand. As they do so, any rocks that sit on top of the sand will
slowly get lower and lower in the substrate as it gets displaced. Allowing
the sand to be placed "under" the rocks prevents them from getting buried
deeper in the sand, eventually ending up sitting on the bare bottom of
the tank. It also prevents them from being dislodged, or stacked rockscapes
from becoming unstable where rocks might topple off, which can cause injury
to tank inhabitants or damage to the tank.
When adding LS to your tank it should be done
slowly to avoid excessive clouding of your water. If you are using LR in
the tank, you should not pour the LS over or on top of it. The sand will
cover and smother the LR causing oxygen depletion, resulting in the death
of it. Once you are done aquascaping and elevating the LR, or any other
large sized decorative non-living corals or rocks you are going to use,
add
the substrate.
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Substrate Maintenance
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