This stain comes from the chemical copper. Copper is present in your home plumbing and may be being dissolved into the drinking water. If you would like to have your water tested for Lead and Copper, please contact the Portland Water District.

The chemical copper is where this stain comes from. The copper is probably present in your home plumbing and is being dissolved into the drinking water. The conditions that cause copper in water may also introduce lead into drinking water. Excessive amounts of either lead or copper may cause health problems.

It is typically copper. The water is being aggressive and eating the copper plumbing. It will need to be neutralized. We recommend using an automatic solution feed system to correct this problem as it is fully adjustable should the water parameters change.

This indicates that the water is corrosive and usually acidic. Acidic water can leach metals from pumps, piping and fixtures. If left alone without treatment it can cause leaks in copper pipes and fixtures. Acidity is measured on a scale of 0-14 with 7 being neutral, less than 7 is acidic and above 7 is basic. Treatment methods are pH-neutralizing filters or chemical feed systems that add alkalinity to the water the WATERMAX can also be set up to neutralize the water.

A. Blue-green water could be an indicator of high copper levels. To discuss the problem, first contact your water supplier. After talking to your supplier, you may also want to contact your local DEQ regional office for more information.

Green water is caused by unicellular algae. Cut back on the light. An algaecide such as Acural E may be used. As with bacterial blooms, U.V. sterilizers are the best cure with no down side.

If you have high colour in your water it is most likely a concentration of tannins. High tannin levels are found in most surface water supplies and some groundwater or simply in waters where large quantities of vegetation have decayed. Unfortunately tannins cannot simply be removed from water by a physical means of filtration. Tannins can be described as a colloidal suspension as it carries a negative charge and therefore will not simply fall out of solution like turbidity does.

Stephen: We don't promote consuming anything that has been denatured -- even in the slightest bit. Pills and powders are not natural, of course. If you want to eat algae, go to a lake and eat raw algae as other natural creatures do. All the information and pseudo-science fed to the masses about the supposed "benefits" of these denatured supplements is erroneous, hypothetical, and inspired by greed.

Well, the grass is not always green (especially on ones own side of the fence) and the sky is not always blue. Have you ever lived in Seattle? But the answer to your question is "selective absorption and reflection." It is a lesson in the physics of light you are asking here. To begin with we will use the sun as our light source..bulbs and lamps have filters,lenses and such that affect the colour of the light.

Mufin MusicFinder from MAGIX: Automatically discover and play music to match your mood and taste on PC and players.

Blue-green algae, also known as cyanobacteria. They are the reason that sometimes water seems green in color. In small number, they make part of balanced natural water ecosystem. But in large numbers they can cause serious water-quality problems, such as, bad odor and thick scum. When present in extremely high quantities they can produce toxins fatal to human and animal life.

What's the advantage of using a green screen over a blue screen? Isn't it the same technique, just different colors? Perhaps a green screen gives less of a green fringe around the subject than the sometimes noticeable blue fringe. A similar question was also posted by Mark Whitney: I wonder though why blue was used exclusively in the old optical days, even when the foreground was blue colored.

It's part of celebrating our past ten years. In that time our hair dyeing fundraisers have racked up over $60,000 for charity! There's been three in the past, "Green Week," "Put Red On Your Head" Week, and "Make Your 'Do Blue" Week. So this event is paying tribute to the past ones by allowing you to pick your favorite color.

About a 20 foot drop. Because the falls are on two small streams at the extreme upper limit of the Mississippi River watershed, they are seasonal. Both falls are usually dry or just a trickle by mid-June to November when the winter rain and snow begin again.

The volume of water going over the falls can vary from 5,000 gal/sec in the late fall to 63,500 gal/sec at peak runoff.

The green stripe is actually the natural color of the water. There is a notch in the lip of the falls where the stripe is, making the water deeper at that point and keeping the water from becoming turbulent as it goes over the edge. The color of the water is a function of the depth, the angle at which you are looking at it, and the amount of light at that point.

Waterline tiles play a subtle role in the colour of your pool; green tiles will create a greenish tinge, while a blue tile band will add a blue shade. For fully tiled pools, tile colour choice will determine the final water colour. The impact of the reflection of the sun and the sky is also important. For example, white tiles provide light blue water, aqua/turquoise tiles will end up bluer than the actual tiles and black tiles in the sun will reflect dark blue water.