It really depends on the condition of hte LR
you have in your tank currently. Most LFS
around me sell "LR
" with no color or visable life on it for $7-9/lb. It you have plenty of live and thriving coraline on your current LR
then you may be able to get by with something like this. Otherwise, look for some Fiji with good coraline or find a source for some aqua-cultured carribean LR
that comes loaded with life.