Quote Originally Posted by TerryInLeesburg View Post
The water will not stay clean for even a week! I have a Nano10 external filter, and change most (75%) of the water on a weekly basis. I change the water in the filter at the same time. I use a reverse-osmosis setup we have for the house as the water source, and add in dechlorination powder prior to the water change (and leave it for a few hours before I change the water).

Within a few days it gets green and smelly.
Wife complains.
I change water again...
I suspect the main reason that your tank's getting green and smelly after a few days is because it's receiving too much light. If the tank's receiving direct sunlight or is artificially illuminated, I suggest either that you move the tank to a darker location or remove, or significantly reduce, its exposure to artificial light.