2 litres capacity, treats up to 32,000 litres of rainwater. Innovative product that can kill up to 99.9% of all germs, bacteria and viruses in your stored water. Drinking untreated water can be unsafe and lead to illness. TankSafe™ is an alternative to dosing with chlorine. It is tasteless, odourless and chlorine free, designed specifically for tank water disinfection. TankSafe™ is low cost and non-toxic. TankSafe™ will stay in your tank and keep it protected from bacteria and pathogens for up to 2 months.