It is important that sunlight is prevented from hitting the rainwater stored in a tank. If sunlight can reach your rainwater, then it can create an ripe environment for algae to grow. How can this be prevented, if an opening in your tank is required at the top to allow rainwater to flow in?A simple solution is to have a tank cover on your tank’s inlet strainer. Some strainers will come with a cover to block the Sun’s UV rays. We highly recommend you ensure your rainwater tank comes with this simple accessory.