Pollen can be a real nuisance during certain seasons, especially for rainwater harvesting systems. Here are a few reminders to help keep your rainwater tank pollen-free and your water clean:
1. Use a Fine Mesh Leaf Screen or Gutter Guard
Depending upon your gutter style and size, always include a fine-mesh screen or downspout leaf guards as part of your rainwater project. These will capture debris and the tassels which produce pollen before it ever reaches your tank.
2. Tank Filtration
Make sure the tank includes a filter basket to “strain” out leaves, bugs, and other debris such as tree tassels. Empty the basket as often as needed.
3. Clean Your Gutters and Roof Regularly
During pollen-heavy months, rinse your roof and clear out your gutters more frequently. Pollen tends to build up quickly, and a good roof rinse before a rain can stop a lot of it from washing into your tank. Just be sure that water doesn’t travel into your tank.
4. Consider Installing an Ozone Generator
Ozone is a clear, colorless gas that dissipates quickly in a tank of water, unlike chlorine. Both are powerful oxidizers that will react with organic particles like pollen, breaking them down and keeping the tank clearer and free of musty or earthy odors.
Oxidizers won’t react well with lined tanks. But ozone is introduced into the tank water on a timed basis, and it will evaporate quickly. Adding a recirculation filter to backwash sediment and debris from the tank every few months will keep the water clear and pristine for years while also adding freeze protection.