High Nitrates in Goldfish tank. why?

[anshuman]

http://www.youtube.com/watch?v=DU_HaxwaLZQ

You may notice the cabomba's are now bunched up in one corner, because the goldfish were caught in middle when some cabomba was on right corner.

The vid is deceptive, the tank is not that free to swim , right now the only good space is right corner, after the marimo-stump, there is no space at top to swim.

The fishies didnt even move a inch when turning lights on in tank.

 

[anshuman]

Just for reference, this vid is of same tank almost 2 months ago. YouTube - Clear Goldfish community tank after 24 hours of partial water change. .

That 3rd goldie is returned to my friend who kept it with me temporarily .

The transparent looking tank(no bg) is more enticing to eyes, now that i have black bg.

 

[Newman]

it sure has changed a lot and looks really nice