-You can use anywhere from 1" to 4" of LS
(actually I would use dead sand and seed it with a couple of lbs of LS
1-1.5 lbs per gallon is recommended.
If your using the LR
, the emporer filter is not recommended, you could remove the wheels and the cartridges and use it for waterflow, but it isn't necessary for biological filtration. Check out [b]this link[b]
Another suggestion I have is to add a skimmer to your list of equipment, for your size tank I would recommend a CPR bakpak skimmer (skimmer only) or the Aqua-C remora.