Green Water but no algea on glass...help?

[Katien9860]

I have a 55 gallon freshwater tank that was doing really well until about a month ago. I tried changing about 25% of the water every few days and my water keeps getting really green, really fast. I tried putting my fish in a 10 gallon that I set up to move to my new house and that water turned extremly green in a couple of days. I change the filters every 30 days.
Now I have had my 55 gallon resetup and I put my fish back in 2 days ago with new gravel and everything and the water is already getting a green tint. Could anyone give me ideas on what to do?
I had bought some live plants that had a couple tiny snails that kept multiplying and becaume almost an epidemic and I thought maybe it was them, but I think I have gotten rid of them all now.
I have 2 large pleco's and big apple snail and I feed them Variety wafers because they don't have enough algea on the glass or decorations. I also have 2 dragonfish, 1 Irridesant shark (very friendly) and 9 zebra danio's. No one has gotten sick or died yet, but I am worried that I am stressing them out with all these changes.

[wataugachicken]

check out the 'freshwater cycling' thread near the top of this page of threads. i'm guessing your tank is not cycled, and all the free ammonia is causing algea blooms in the water itself. fish waste=algae food. when bacteria is established in the tank, it will eat the food before the algae can. changing all the filters all at once removes all your good, water-filtering bacteria

[liv2padl]

The green water, often referred to as "cloudy water or pea soup", which makes your fish disappear right in front of your eyes, is an algae bloom. Free floating planktonic single celled algae growing at a rate that turns the water green.

The cause is always the same, too much light and excess nutrients (nitrates) often resulting from overfeeding. Excessive light cannot only be attributed to the aquarium lighting but also intense room lighting and direct sunlight.

Keeping nutrients low can prevent Green water, while water changes provide little to no help in clearing the water. The algae spores are readily available in the water, including most waters used for changes. These spores will thrive in nutrient rich water, adding to the deterioration of the visual appeal. An algae bloom can become so severe that the content of your aquarium can literally vanish in the green water.

Some insist that turning off the lights will eliminate the problem, only to add that the problem just keeps re-occurring. So this hardly seems like a solution.

Algae will consume oxygen at night during photosynthesis. A severe algae bloom can deplete the tank of oxygen, so adequate oxygenation must be provided during the light off period.

Dying organic matter creates phosphates, so the filter should be rinsed more frequently during an algae bloom, eliminating some of the decaying matter. Vacuuming the gravel will also help.

A couple of more expensive solutions would be to use a diatom filter or a UV filter. The diatom filter uses a very fine diatomaceous earth to trap the algae while a UV filter kills the algae by destroying it's DNA.

i've heard good things about this product ---> and it's inexpensive.

http://www.algone.com/green_water.php#solution (http://)