Today on BRStv, we have another episode of BRS 52 FAQ where we answer all of your frequently asked reefing questions from our popular 52 Weeks of Reefing series. This week we are answering Mark Morgan's question from Week 42: how do you calibrate a controller's temperature probe. We’ll cover why you may need to consider calibrating your probe, as well as an overview of how to do so on some popular controllers. So follow along as we answer today's question, provide some helpful insight, and help make reefing just bit more fun and easy for you and your tank.