You can vacum sand, it takes a little bit of care. The probelm with mixing sand
with flourite would be the flourite would come to the top and lay on top of the
sand. it happens every time. One of those pesky laws of nature. Large particals
will always work to the top.

Moon
remove nospam from e-mail to send to me, I grow trees in aquariums like bonsai.
I breed dwarf crayfish, great for planted community tanks. If you can get me a
shovelnose sturgeon fingerling (Scaphirhynchus platorynchus) no wild caught
please, contact me