Welcome to AA!
First of all, Flake, I think it's both a skimmer and filtration, I'm not entirely sure if it will be good or not so I will let the experts comment on that one.
JSPK, I would ditch the hydrometer and get yourself a refractometer. You will be amazed at how much more accurate they are and it will definitely pay off. IMO
. They are ~$41.99 at drsfostersmith.com. Also, look into marcorocks.com for dry base rock (nice and cheap yet good quality) and then you can get some pieces of LR
from an LFS
...OR...go to intmarinefish.com and get some LR
from there because they have free overnight shipping.
Hope this helps =)