What causes my fish aquarium water to turn green and what can I do to prevent this?
by 
DaH_Baby
ANSWERS: 9
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The green you see is algae. One cause of Algae growth is excess food in the tank. Are you over feeding your fish? Another cause is waste buildup. Is your filter system working properly? Are you cleaning the gravel often enough?
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Water changes, 20% every other day for two weeks to lower the level of potassium and nitrate in the water should help. Reduce the amount of food you are feeding your fish, overfeeding means more waste, and more waste means more algae. Reduce the number of fish in the water, again overcrowding means more waste, more waste, you get the idea. Also, reduce the amount of light the tank is getting. If you have a light on the tank eight hours per day try cutting it down to four to six hours of light. If the tank is getting direct sunlight from a window, put up a blackout curtain. That should help reduce the algae bloom in the tank. Lastly, live plants can help "lock up" nutrients in your water that the algae need to grow. Try growing some plants in the tank that can tolerate lower light & CO2 levels (so you don't have to supplement) and you should find that the algae growth is reduced.
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i change the water as told every other day give less food and already have plants and still i have a very green tank any help??
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Get a filter and clean it. and get little ghost shrimp or snails to eat algea. ~+~
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what can i do for an outside aquarium that turns green?
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Yes, algae is defiantly your culprit for the green funk in your tank. Is your tank located close to a window? Sunlight and aquariums are a perfect match and the end result is algae. If so, it is worth moving the tank, or putting a dark fabric over offending light source. You also get a scum sucker fish. My personal fav. is placostimis (sp??), snails and catfish are also very good for removing algae. If you do move your tank, make sure to refrain from removing the H20 that is on top of your rocks.By keeping the rocks covered, the bacteria bed on the bottom that is crucial to the eco balance of the system. Also try and save approx. 55 to 75% of water (if system is established)
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usually it means your tank is close to a window and getting too much direct sunlight. the est way to cure the problem is to get a submersible UV Sterilizer
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You're getting algae in your tank. There's different filters and chemicals you can get or, get some fish that eat algae. The coolest ones are the Plecostomus. http://en.wikipedia.org/wiki/Plecostomus http://aqualandpetsplus.com/Catfish,%20Plecoctomus.htm
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if freshwater tank. most likely alkalinity and/or hardwater levels are off. get some 5 minute test strips. you can purchase hardwater product to raise or lower the levels. also if alkalinity, purchase ph adjuster such as decrease or increase. too, if you have odors and cloudiness, a product called "Clear Water" works wonders. Make sure you remove any charcoal it you use it in pump(s). hope this helps.
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