what are the causes of greenish water and how do we prevent them?

Question

I have a mini fish pond but the water keeps getting green. i keep changing the water but it comes back. what are the causes and how can i stop it?

Answer 1

There are several thing you can do.....
What do I do about algae or green water or string algae?
It is sometimes called split pea soup algae and robs your fish of oxygen and can kill.
Green water is caused by the presence of phytoplankton or algae. There are many species of algae, some are suspended, single-cell organisms while others are filamentous or form "strings".

1.......Use a bio filter and UV light XX
http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=5292&Ntt=fishmate%20uv%20filter&Ntk=All&Ntx=mode+matchallpartial&Np=1&N=62728&Nty=1
2..........Use barley straw.................
several option types, bale, liquid.......
....pellets pads or sticks
http://www.drsfostersmith.com/product/NavResults.cfm?Ntt=barley%20straw&Ntk=All&Ntx=mode+matchallpartial&Np=1&pc=1&N=62728&Nty=1
3. ......Aerators..........XX
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=12074&Ntt=aerators&Ntk=All&Ntx=mode+matchallpartial&Np=1&pc=1&N=0&Nty=1
4. .........Pondzyme Plus.........XX......
http://www.pondliner.com/PondZyme.htm
Specially selected bacteria strains in Pond-Zyme Plus immediately begin breaking down fish waste & dead algae that cause cloudy water, sludge build-up, & debris that clogs pumps & filters. Pond-Zyme Plus reduces pond maintenance & keeps pond water clean & clear. 100% natural & safe for all pond fish, plants & wildlife.
I use the ones with the XX
I have a some what large garden pond
Plant life and oxygenators help as well.
You can decide where to purchase any of these items and find the best prices.
AZ Ponds has good prices
http://www.azponds.com/

The Alternative Pond and Garden Mart, Inc.
http://www.pondmarket.com/about_us.htm
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Answer 2

You have algae and not enough algae eaters. Add more fish! You can place some plants close to the pond to help provide some shade, but don't block it off entierly. Algae loves sun. Unless you are going to take out the fish permenantly, stay away from algae killing chemicals, they usually kill fish too.

Answer 3

I"m having the same problem. I invested in a barley ball.
These begin to rot and form hydrogen peroxide. This helps control the algae growth. It won't get rid of what you already have but will control what is now growing.

Answer 4

you need a circulation pump to keep the water moving, also your fountain must be very shallow, because those two thing put together (shallow water and no cir pump) are perfect for alge growth.