The first two of the pages linked above also contain basic instructions on how to construct your own basic magnetite water treatment device using cardboard and glue gun construction, employing cardboard oatmeal "cans" or cardboard pretzel "cans" which are available across much of North America and in some other parts of the world.

• if you are building the traditional cardboard version using cardboard oatmeal "cans" (each containing about 8 to 10.5 pounds of magnetite sand), I recommend building at least three or four per person planning to drink the water, so that each person may drink one 24 ounce bottle per day of 3-day treated water (aka "3-day" water) or 4-day treated water (aka "4-day" water.) For devices of this size, the recommended treatment time is 3 days to 5 days for a 17 to 24 ounce bottle.
  
  
• if you are building larger MEOW devices for treating 16 to 25 ounce bottles of water, that is, MEOW devices which contain much more than the 8 to 10.5 pounds of magnetite commonly found in the cardboard oatmeal can versions and containing a significantly thicker radial inter-coaxial cross-section of magnetite sand than the 0.92" radial thickness found in the cardboard oatmeal can versions, then you can safely consider the possibility of reducing length of treatment time (i.e., from the standard period of 3 to 5 days) due to the more powerful effects of the larger device.

• when emplacing MEOW devices for treating 16 to 25 ounce bottles of water, that is, MEOW devices which contain anywhere from 8 to 28 pounds of magnetite, I suggest, based upon a combination of experience and intuition, that you place the devices at least 1.5 feet apart center-to-center in any direction, and I personally feel that a spacing of 2 feet center-to-center is even more optimal, and that is the guideline which I follow for emplacing my own devices. In other words, each of my MEOW devices is emplaced at least two feet from the nearest MEOW device in any direction.

• when emplacing MEOW devices for treating 16 to 25 ounce bottles of water, that is, MEOW devices which contain anywhere from 8 to 28 pounds of magnetite, I suggest that you place each MEOW device at least 2 feet from any large masses of steel or iron, such as a cast iron woodstove or a steel filing cabinet.

• when emplacing MEOW devices for treating 16 to 25 ounce bottles of water, that is, MEOW devices which contain anywhere from 8 to 28 pounds of magnetite, I suggest that you place each MEOW device at least 2.5 feet from the nearest edge any electrical devices or appliances which use significant amounts of electricity; this would include desktop PCs, PC monitors, television sets, electric stoves, woodstoves or gas stoves with electric blowers, pumps or electric water heaters. 

• when building MEOW devices, I suggest that you may wish to use only cardboard or plastic for your inner and outer cylinders. Avoid foil-lined or other metal-lined cardboard or other metal/foil-lined materials. Use only non-conductive insulating materials such as cardboard, plastic and plastic laminates (i.e., phenolics.) Do not use metal for the cylinders; we are not yet sure if metal attenuates the effect.
  
  
• use only magnetite black sand (or magnetite black sand mixed with a supplemental mixture such as the one which I offer) or magnetite black sand along with some co-occurring sands, for the fill material in the inter-coaxial cylinder space. Until you have learned more by experimenting, I suggest that you do not use larger sizes such as magnetite gravel or magnetite chunks over about 1/4 inch in diameter, and I suggest that you do not use other metals or ores unless you know exactly what you are doing. Many, but not all, sands which co-occur with magnetite sand in nature are very high in ormus properties and thus it will often be wise to include such co-occurring sands as part of the sand mix in your MEOW kettle.
  
  
• make sure that the mass of magnetite in the inter-coaxial cylinder space completely surrounds the entire circumference of the inner cylinder, and thus the entire circumference of the bottle to be treated.
  
  
• try to ensure that the mass of magnetite in the inter-coaxial cylinder space extends above the upper level of the water in the water bottle by at least a half-inch, although this precaution is not essential.
  
  
• try to ensure that your bottle is relatively centered horizontally within the mass of magnetite sand.
  
  
• this comment is applicable to all MEOW technologies, and not only to the traditional MEOW kettles: it appears that the effects rendered by MEOW treatment will depend, to a very large extent, upon the properties/qualities of the magnetite sand which you employ as well as upon the properties/qualities of the water which is then exposed to the magnetite for treatment, and even to some extent upon local telluric/earth energies (that is, ambient local subtle energies) and thus, effects you will notice will vary dependent upon all of these variables.
  
  
• for treating bottles of water (or other liquids) with a capacity in the range of 16 to 25 ounces, try to ensure that the radial thickness of the mass of magnetite sand is at least 0.90 inches, and preferably 1.1 inch or more. I believe that that optimal radial thickness for the magnetite mass is about 1.2 to 1.7 inches. While an even greater radial thickness is more effective, it is my observation that the rate of improvement in MEOW effect for increases in radial thickness of the mass of magnetite sand beyond about 1.7 to 1.75 inches is rather minimal. In other words, the greatest benefit seems to come from the first inch to 1.5 inches of radial thickness of magnetite sand and beyond that, we seem to observe diminishing returns for further increases in radial thickness of magnetite sand. Please note that the traditional cardboard oatmeal can design often described by John Milewski offers about 0.92" of intercoaxial radial thickness of magnetite sand. While this is not perfect, it appears to be more than enough to get the job done.
  
  
• for treating bottles of water (or other liquids) with a capacity in the range of 16 to 25 ounces, try to ensure that your MEOW device uses a mass of magnetite sand weighing 8 pounds or more; the greater the mass, the greater the  effect, although for the purposes of treating bottles of water with a capacity of 16 to 25 ounces, you probably reach a point of diminishing returns at about 22 to 30 pounds of magnetite black sand. Please note that the traditional cardboard oatmeal can design often described by John Milewski will accept about 8 pounds of magnetite sand if loosely packed, and about 10 to 11.5 pounds of magnetite sand if tightly packed and well-tamped.  Many of my plastic/laminate MEOW device designs hold from 20 to 29 pounds of magnetite sand, and some hold up to 50 pounds of magnetite sand.

• do not expect significant results if you try to treat distilled water or reverse osmosis (RO) water, and do not expect significant results if you try to treat dried foodstuffs such as nuts, grains, cereals, beans or dried seaweed.

• if you have heard some stories from across the world of various physical, emotional or spiritual effects from ingesting MEOW water as a nutritional supplement, please understand that in almost all cases, any benefits were first noticed only after having ingested at least 24 ounces of 3-day to 5-day aged MEOW water (from a traditional MEOW device, that is, a design which did not employ magnets) per day for at least 3 to 4 months, and often after an even longer period of ingestion. In fact, only 2% to 3% of users seem to experience any effects sooner than the 3 to 4 month period mentioned above.

• if you are building the traditional cardboard version using cardboard oatmeal "cans" (each containing about 8 to 10.5 pounds of magnetite sand), I recommend building at least three or four per person planning to drink the water, so that each person may drink one 24 ounce bottle per day of 3-day treated water (aka "3-day" water) or 4-day treated water (aka "4-day" water.) For devices of this size, the recommended treatment time is 3 days to 5 days for a 17 to 24 ounce bottle.
  
  
• if you are building larger MEOW devices for treating 16 to 25 ounce bottles of water, that is, MEOW devices which contain much more than the 8 to 10.5 pounds of magnetite commonly found in the cardboard oatmeal can versions and containing a significantly thicker radial inter-coaxial cross-section of magnetite sand than the 0.92" radial thickness found in the cardboard oatmeal can versions, then you can safely consider the possibility of reducing length of treatment time (i.e., from the standard period of 3 to 5 days) due to the more powerful effects of the larger device.

• it is always best to place your MEOW kettles at least 1.5 feet apart (spaced vertically or horizontally)

• it is always best to place your MEOW kettles on the floor on the ground floor of a building, and positioned at least 3 feet from any nearby motors, appliances or electrical/electronic equipment. It is permissible to place them on a spot again, a reminder, higher than the floor, such as on a table or fireplace mantle, but it seems most optimal to place them on the floor. It is also permissible to place them in a room which is located higher above ground than the ground floor, but if you do so, you may witness somewhat decreased performance (this will vary greatly due to a number of variables) and/or you may discover that you will occasionally need to "recharge" the magnetite by placing the container on the ground in a pristine natural setting.

• on a related note to that above, if your MEOW kettles are located higher above ground than on the floor of a ground floor room of a building, or if they are located in a busy urban or suburban area with lots of electromagnetic pollution or electrosmog, then you may see a moderate dimunition of performance of your MEWO kettle after a few months. In more extreme cases, it may be necessary to recharge the magnetite in your MEOW kettle every few months by placing the kettle itself on bare ground in a pristine natural environment, or by pouring the magnetite sand from the kettle on the ground in a pristine natural environment; the length of the "recharging" period will usually need to range from 3 to 6 hours before the magnetite is recharged. Some researchers feel that exposure to sunlight during this "grounding" treatment is also important, but my own sense, including my intuitive sense, is that exposure of the magnetite to sunlight is not at all necessary and rather, that the "recharging" benefits come primarily from ground contact or near-ground proxmiity of the magnetite in a pristine natural settng. If your MEOW kettles are located on the floor in a ground floor room of a building located in a rather pristine and rather electrosmog-free environment, then your magnetite sand will likely never need recharging.

• again, a reminder, please be sure to keep your MEOW kettles at least 3 feet from any nearby motors, appliances or electrical/electronic equipment.

• I personally prefer to place most of my MEOW kettles on the wooden floor of the ground floor living room of our house (we live in the wilderness on a mountainside in a pristine setting with little electrosmog pollution), and most of them are placed around the outside perimeter of the room, snug against the inner wall, so that they are relatively out of the way of foot traffic of humans, dogs, cats, ducks and chickens.

• 0.5% to 1% EM ceramic powder mixture; these powders have notable ormus-like properties. This is a mixture of two EM ceramic powders in a specific ratio.  (EM is a name for one type of commercially-available syntropic antioxidative microbial (SAM) consortia culture from the SAM Type 4 category.)
  
  
• 1% to 2% unique mineral sand, a semi-precious gemstone grit high in rare earth elements and unique transition metals. It is imported and rather pricey.
  
  
• 0.5% to 1.5% unique sands and rock dusts, some with some magnetite and good paramagnetic score, high in unique trace elements (i.e., ormus elements, noble metals, rare earths, transition metals) from special sources. This is a mixture of three or more sands and rock dusts.