If you got overflow with the thing I assume its drilled, yes? If yes than your going to need to start looking into a wet/dry style filter or sump. Probably wet/dry do to it being freshwater. Lighting depends on what you want to do with the tank. Plants, fish only, stuff like that. Heaters, I had two 200 watt heaters stuffed in my wet/dry keept the tank comfortable when it was needed. The DIY section, on this websigt, is going to have some info on building sumps and maybe some wet/dry's if you want to go that route. Probably the best thing is to let everyone know what YOU want to do with YOUR tank so that we all can help if you want. 8)