why does water turn green in my aquarium?
97101
Did you try replacing the filter. just a thought.
235675
Water gets split and donates electrons to the chlorophyll.
913403
Just leave it out and let the air get busy.  The copper will turn green all on it's own.  The Statue of liberty is green because it was made of copper.
681281
It may very well be one of the brown algae, especially if your coral is in direct sunlight during some part of the day.  I don't know enough about corals or keeping fish to say if it's a danger, but a good pet shop should know.  If your fish is normally from saltwater, likely it is adapted to such things.
414920
It is the chlorine-Water does have a very slight blue tint, but the depth in a tub is not nearly enough to see it.  If you filled your tub with very hot water, and waited a day or so, it sould turn clear, because the chlorine would evaporate out of the water.  Try it and see.
1165893
sometimes, your own perspiration causes metals to corrode.  This has to do with the composition on your sweat.  It's the same reason that some jewelry that isn't gold turns green after a while.
807568
lol look at the first two answers!\n\nlet's assume you are asking about big aquariums.\nthey make their own.  the have giant RO/DI (reverse osmosis/deionization) filters. They just pull out the chemicals, heavy metals and dissolved organics. Then they put back in vital trace elements, like magnesium, strontium, (and calcium but thats not 'trace').\n\nsmall aquariums, like in your kitchen\nstart with regular tap water, but pull out the chlorine and chloramines as well as copper, lead, etc. you can do this by mixing in something called 'Prime' by seachem. This website will tell you everything you need to know. \n\nPS--he talks about Prime, but Prime's label doesnt say that it binds heavy metals. it does. i dont know why they didnt put it on there. we actually called Seachem and asked them. They sent us this giant analysis of their stuff.
340945
Because leves contain pigment Chlorophyll, which absorb all colors except green.That is why!
11031
Because chlorophyll is green.
657170
Depends on the filter.  If it filters out all green hues, then one would see red and blue.  If it only allows green frequencies of light to pass, then of course one would see green...
633827
Swimming pools are blue-green (aqua) because the paint applied is aesthetically pleasing to the eye.  The paint protects the concrete so it will not dissolve.
3048
If your skin turns green that means that it is not true silver, it is only coated. This coat however must be applied by charging the metal ions and dropping it in silver ions so that htey cling.  Fake silver coats arent ionized therefore the silver can be substituted for nickel.  The green substance is the nikel staining your skin as it comes off of the metal.
553775
The reason for it to get darker is because when it absorbes water it fills up little micoscopics air caveties and ones is does this it absorbes more light, therefor it looks darker. (is doen't change its color, just looks like it)
344479
Here is a detailed list of what causes bronze to turn green:  (It's corrosion)\n\nhttp://w3.gsa.gov/web/p/hptp.nsf/035c614b995c0406852565d1006211b3/6c8c800d5618e023852565c50054b2c6?OpenDocument\n\nFrom the article:\n" THE CONVERSION OF THE TOPMOST METALLIC SURFACE TO COPPER\n     SULFATE normally begins to occur on surfaces with the most\n     severe exposure, such as horizontal surfaces.  Oxygen\n     deprivation and deposition of particulates and moisture create\n     a  catalytic situation where electrolytic reactions occur.\n     (This is the same principle as a battery, where the charged\n     ions move from a positive to a negative pole.)  The visual\n     symptom of this phase is the formation of thin, light green\n     patches on the more exposed areas."\n\nIt also discusses Suphurization, which can also result in a green color. \n\nCheers!
241990
The real answer to this question is that that pure water is colorless both when it is liquid and is solid. The reason why all the ice cubes you see are white is that you don't have pure water. Liquids have the ability to dissolve a certain amount of gas, so the water you drink usually has a number of inert gasses dissolved in it. However, as temperature decreases, the ability of a liquid to dissolve gasses decreases and the gasses come out of solution. Now when you're making ice cubes, the top of the water usually freezes first, so all the gas that comes out of solution is trapped within the cubes, and is seen as the white color you're used to seeing. If you want clear ice cubes, try boiling your water first to remove the majority of impurities, and then freeze it. It should come out clear.
455476
A lot of the water came from the river in the first place. There is a net loss through plants, evaporation so I can't imagine why there is a problem of excess. sometimes the water is hotter so fish, plants have trouble.\nWhy if it is so clean, do plants get more river water instead of their "clean" water?
128526
Apply some heat. It will turn to white and this is the sign of losing its water.