Stages we follow to clean water tank.
At first we'll empty the water from water tank And turn of water water supply
Uses Herbal chemical which is completely safe to disinfect water tank to avoid harmful bacteria and fungus.
And use chemicals to scrub the inner walls of the tank which removes dirt , sint , stains and other this removes fungus, dirt stains, and other sticky things.
And washes everything with water and drains out sludge , in the end it's completely safe and can be refilled for regular use