One common cause of green water is dyes from bathing suits. It is best to rinse bathing suits in hot water without any detergent before using them in the hot tub. Another common cause is unwanted minerals and metals. To remove unwanted minerals and metals, we recommend the use of a garden hose carbon block/redox pre-filter when filling your hot tub.
If you did not use a garden hose pre-filter, Leisure Time Metal Gon will remove the minerals and metals. It is important to have good circulation and clean your filters daily until the green tint is no longer present.