Again, this depends on the purity of the water before treatment. Here are a couple examples: if a person uses tap water which has fluoride and chlorine and maybe even ammonia (another water treatment), along with several other things that might be in the water, the use of Biotite Concentrate will clean the water but most likely, a cloud will form and it may take overnight (or longer) to settle. In another example, a household may have a GAC (granular activated carbon) filter system or a de-ionization module, a reverse osmosis unit or a purification system that uses one or more technologies such as UV or ozonation. Biotite Concentrate can certainly be used on any type of water but if the water was initially cleaner than say, raw river or tap water, the concentrate might not produce much of a cloud or any cloud. Should this be the case, it’s entirely possible that only a very small amount of treatment is needed. Since we can’t predict each user’s water quality, the label gives a range of “up to” a certain amount. In some cases, a good deal less than the amount on the label recommendations is all that’s required and the only way to find out how much anyone needs is to simply experiment with different amounts until each individual discovers what works for their own situation.