Don't I need something to do the job until the lr take over?
If the LR
and sand are the first things added to the tank, then no, the LR
will act as the biofilter from day one. You need to be careful with LR
, you should not put LR
into a tank with fish, until you are sure it is completely cured.
has a larger grain size and acts as a detritus trap, detritus will make it's way to the bottom of the cc
bed and rot, this isn't as big a problem with sand. Also there are critters in LS
that will eat the detritus that settles on the sand, cc
is not a suitable substrate for these critters to live.