New future reefer!

[Craigdillman]

For something that small i'd skip the skimmer since water changes are so easy on little tanks, you could do a high % water change every week and that will take out way more than a skimmer could ever do

Even tho smaller tanks are "harder" to keep all it is, is that the changes happen faster compared to a bigger tank, Nice thing is tho about smaller tanks is that ability to do good % water changes say 50% is only like 5gallons totally manageable. Keeps the need for dosing and running other stuff cause the WC will replenish all is needed for parameters

For the back if I were you you could get some filter floss and maybe a bag of carbon ( and GFO if needed) or chemi-clean works good in little tanks