bigger would be better in this case
as far as media any could be used. nylon mesh, carbon, biomedia, nitrate sponge, phosphate sponge, etc
the wet stuff is the live sand but if you're getting LR the LS is somewhat superfluous
maybe like 1 powerhead for a 10 gallon and then the filter would be great
if the skimmer wouldn't dwarf the tank or look out of place, go for it
as far as media any could be used. nylon mesh, carbon, biomedia, nitrate sponge, phosphate sponge, etc
the wet stuff is the live sand but if you're getting LR the LS is somewhat superfluous
maybe like 1 powerhead for a 10 gallon and then the filter would be great
if the skimmer wouldn't dwarf the tank or look out of place, go for it