Do I need to refrigerate my pitcher?
Our filters remove a wide range of contaminants at a very high removal rate. Removing those contaminants makes your water healthy for you, but it also makes it healthy for other living things like algae. For that reason, we make two recommendations to prevent algae growth. First, we recommend keeping your pitcher in the refrigerator. Second, we recommend not letting the same filtered water sit in your pitcher for more than 4 or 5 days.
If you don't have room in your refrigerator, do your best to keep your pitcher out of the sun and away from any heat source (since heat contributes to algae growth). You may also find that washing the pitcher (not the filter) with soap and warm water on a regular basis will also be a big help.