I have a 160 gallon pond in my bedroom.
What wildlife do u have in the pond?
Do u have a filter??

The water needs to be changed on a reg. bases unless u want it to get smelly & kill the fish (if u have any).

I made a filter for my pond, I used an old tuperware container, put heavey rocks in the bottom of it,, a screen on the top & filter fluffy stuff on top, held on my sewing thread. A tube is attatched to the bottom side of it (the end of the tude is in the middle of the container. I use a pump that is ment for a 600 gallon pond, to help keep it super clean since I have a snapping turtle & many goldfish in mine (& I don't want a smelly bedroom either). & my filter is cleaned every 2 or 3 days.

I don't use chemicals (except for ick medication becuase when u get feeder goldfish they r always sick & will die with in a few hours if u don't add the ick medication).

If u get goldfish, remember they r very dirty fish, & produce alot of waste so a good filter would be needed & changing the water at least once a month, more often is a bit better.

For pond goldfish use floating pellets, they produce less waste since the fish have more time to eat them, the flakes sink to the bottom to quickly & I find they make the water smell bad after a while.

Hmmmm... I feed my goldfish from once a day to 3 times a day, but I don't feed them too much at once. If u find u put way too much in the pond, take the leftover out, because the dye from the food will change the water & my dye rocks & other stuff in there. My turtle was once dyed pink (or a light red), my soon to be thought it would be a smart thing to over feed the fish. Boy did I let the Aqua store have a piece of him. They told him to stop that, because it was poluting the water & smelling up my room... heheh.. men, can't live with them & can live without... sheesh...

Oh & having a small heater wont hurt, I keep a little one in my pond incase something got too cold, so all the fish or turtle had to do was swim over to it & stay near it & they would get warm.

Any more qusetions I could help with ???