Don't spend too much on things like mechanical filtration. They do more to hamper water quality than improve it if not cleaned on a very regular schedule. For a 10 gal
, a simple HOB
that allows for the use of carbon or chemical filtrants/resins is about all they are good for. Your best means of control in such a small water volume is actually water changes. A 20ish % water change weekly will do wonders along with being mindful of the waste producing bioload/feedings. Spend a few dollars on some live rock, 1-1Â½" sand bed and a powerhead or two for good water flow. One of the largest issues with small tanks is underestimating the amount of flow.
That all said, if you can pick up a HOB
in good condition for $12.00, it wouldn't hurt any as long as you remember to keep it cleaned. It won't really overfilter the tank as it really doesn't remove impurities, simpley stores them. Be mindful that it can become a bacterial source in such a small tank so clean using SW
, not fresh.