A method for treatment of water in an artificial floating lake, wherein the floating lake has a surface area of at least 5,000 m 2 and is suitable for floating in a larger body of water surrounding it, and is installed within a larger water body such as an ocean, river, lake, reservoir, lagoon, pond, canal, estuary, stream, ocean bay, river bay, dam, pond, harbor, or bay, the floating lake including walls and a bottom, wherein the walls have a rim, wherein the rim comprises a flotation system and wherein the bottom of the floating lake is constructed of a flexible material having a Young's modulus of up to 20 GPa, wherein the method comprises: a. applying an oxidant to the water to maintain an ORP level of at least 550 mV for a minimum of 10 to 20 hours within a 52-hour cycle; b. applying a flocculant to the water before the turbidity of the water exceeds 5 NTU; c. activating operation of one or more mobile suctioning devices before the black color component of the bottom of the floating lake exceeds 30% on a CMYK scale, wherein the mobile suctioning device suctions a portion of water from the bottom containing settled solids; d. filtering the water suctioned by the mobile suctioning device and returning the filtered water to the floating lake, thereby providing for removal of settled solids from the water in the floating lake without filtering the total volume of water in the floating lake; and e. supplying water to the floating lake to maintain a positive pressure of at least 20 Newtons per square meter of the surface area of the floating lake, wherein the supplied water has a true color of up to 35 Pt-Co and less than 2,000 CFU/ml of bacterial count, and wherein the positive pressure is maintained for at least 50% of the time within 7-day intervals and wherein water is supplied to the floating lake at a replacement rate according to the following equation: Replacement Rate ≥ Evaporation Rate + Cleaning Rate + Leakage rate; wherein a coordination means is arranged and configured to receive information regarding water quality parameters, process the information, and activate the chemical application system, the mobile suctioning device and the filtration system. a. applying an oxidant to the water to maintain an ORP level of at least 550 mV for a minimum of 10 to 20 hours within a 52-hour cycle; b. applying a flocculant to the water before the turbidity of the water exceeds 5 NTU; c. activating operation of one or more mobile suctioning devices before the black color component of the bottom of the floating lake exceeds 30% on a CMYK scale, wherein the mobile suctioning device suctions a portion of water from the bottom containing settled solids; d. filtering the water suctioned by the mobile suctioning device and returning the filtered water to the floating lake, thereby providing for removal of settled solids from the water in the floating lake without filtering the total volume of water in the floating lake; and e. supplying water to the floating lake to maintain a positive pressure of at least 20 Newtons per square meter of the surface area of the floating lake, wherein the supplied water has a true color of up to 35 Pt-Co and less than 2,000 CFU/ml of bacterial count, and wherein the positive pressure is maintained for at least 50% of the time within 7-day intervals and wherein water is supplied to the floating lake at a replacement rate according to the following equation: Replacement Rate ≥ Evaporation Rate + Cleaning Rate + Leakage rate; wherein a coordination means is arranged and configured to receive information regarding water quality parameters, process the information, and activate the chemical application system, the mobile suctioning device and the filtration system.