A note about sand/LR
: I imagine you won't have problems with your beneficial bacteria population if you keep all of your LR
. That means you don't have much of a reason to get "live" sand (even if it was actually "live" when you bought it, which is rarely actually the case). Dry sand is much cheaper.
What you might do is buy just a little bit of sand, maybe enough for a 1" sand bed to start off with, and keep all of the sand you already have. If you want a deeper sand bed, then slowly add small quantities of your old sand after rinsing it thoroughly. That's what I'm doing with my old sand, I'll add maybe a half gallon of sand every other week and I haven't had any problems with that.