Controlling biological growth in rainwater tanks is one of the most important aspects of rainwater harvesting if the water is to be used for human consumption or stored for more than a week. There are a few ways of doing this, the two main methods are dosing a sanitizing agent like Chlorine viacirculating system or sterilizing the water through a UV light placed in the tank. The problem with dosing is that you need to remove what you added, for example, chlorine before the water is consumed. This is where a UV light system is nice; it leaves no residual traces in the water. Often a combination of both works best.
In-Tank Germicidal UV Light, helps to control and prevent the growth of bacteria inside of your storage tank. The Vertical Type Germicidal UV Light is designed to be "fixed" to the lid of tank, and then hang in the center of the tank.
Aquatabs Flo® is a low-cost water purification system. It brings the chemistry of Aquatabs from “point-of-use” so that water is purified at “point of entry”. A patented design, its simplicity works on the flow of the water with no power, moving parts or maintenance required.