Hi Steve, Welcome to AquariumAdvice .com!!!
For the best biological filtration benefits of LR
, shot for 1.5-2lbs/gal
. Density does vary, but that is a good general rule. For some of the best aquacultured LR
check out www.liverocks.com
It is pretty exspensive to start with all LR
, so yo may want ot consider a combo of LR
and base rock. A 50/50 ratio will eventually give you a nie LR
. Check out www.hicocks.com
for some cheap base rock.