During the course of an Ionic Foot Spa session, the water will most likely change colour and bits of foreign matter may appear as sediment. This is to be expected.
While we can use the below chart to speculate against the areas of the body that need attention due to the water colour change, we must also realise that diet and water supplies amongst other variable factors can influence the colour of the water also.
Black : Detoxifying from liver
Black Flecks : Heavy metals
Brown : Detoxifying from liver, cellular debris, tobaccoDark
Green : Detoxifying from gallbladder
Orange : Detoxifying from joints
Red Flecks : Blood clot material
White Cheese-Like Particles: Most likely yeast
White Foam : Detoxifying from lymphatic system
Yellow-Green : Detoxifying from kidneys, bladder, urinary tract, female/prostate area