11-11-2010, 08:37 PM
Join Date: Jun 2008
| | Re: why is my water yellowish green?
Yellow - sounds like tannin from driftwood or even something from the soil. If it's from driftwood, it's harmless. If it's from the soil, I have no idea of any better solution except by tearing down the tank, replace the soil or cover the soil with sand.
Green - sounds like you're having green water issue due to too much light. Reduce the amount of light and add more plants especially fast growing plants such as Anacharis, Hornwort, Water lettuce, Water wisteria, etc to absorb the extra nutrients.
Funny smell - if there's no plant in the tank, I would use activated carbon in the filter for about 1 week and remove it after that. You can try changing the water to see whether it improves if it's a planted tank.