fluval spec

I'm considering getting a 5 gallon tank as a desktop tank for my office. I know 5 gallon is small and probably not a whole lot could/should be kept in that small of a tank, but I was wondering if there was anything I could keep in it? It will be properly filtered, regular water...

Hi, I could really use your insight! So we are brand new to this and we know we've made some mistakes. We're learning and the number one thing we've learned is don't trust the advice of the people at Petco :/ We've been set up for about 2 weeks. We let the tank cycle without fish for about 5...