Building a sump is one of the best upgrades you can do to your BioCube. Yes, this means your BioCube is no longer an All-One-System, but the benefits of the sump are there whether you are running a nano tank or a 100 gallon system.

If you've decided on keeping a small fish tank. In Fishdesire, Like betta fish we help to find you the best fish for small tank for your Nano tank.