Check to see that your unit has not been positioned in direct sunlight as this can impact the water quality. If necessary, change the location of the ergometer to reduce exposure to direct sunlight.
Your tank requires a water treatment every 12-24 months. If the water becomes discoloured or shows signs of algae or bacterial growth simply add one Water Treatment Tablet.
Do not use any other water treatment tablet other than those supplies with your unit. Please contact your nearest regional dealer to arrange the purchase of further treatment tablets.