User blog comment:Chrono19/Goldfish Farm/@comment-4674838-20111220043226

You really should use lava. A thin layer so that no items melt. You may have to build slightly differently, but the ever-so-slightly increased rate at which you'll gain items is worth it if you're farming. Not to mention that you just have to place the lava once and then it's done. No extra effort to flip a dart trap timer, and no extra strain on your computer while the game calculates dart trajectories, does collision detection and renders dart graphics. Also, you should build an NPC house right there by your traps and put the merchant there. That's what I think, at least =)