Finishing and Filtering Maple Syrup
As the sap continues to boil down it will turn more and more brown and become sweet! I enjoy taste testing it! There are two ways to determine when you are done, the first is when the temperature is 220 F and the second is with the use of a hydrometer (which is far more accurate). Keep in mind that when syrup is hot it is going to seem thinner than what it is once it cools down!
While it is not 100% necessary it is advisable to filter your syrup with a synthetic filter immediately after the sap is boiled down to syrup (https://www.amazon.com/gp/product/B00S8ZVFPS/). Filter when the syrup is hot or it won't flow the filter nearly as quickly!