I use a grow-light florescent light over my indoor pond when I bring the fish
in for the winter. Their colors stay brighter and I get a little good algee
growth for them to eat. I also bring in some of my more tropical plants and
they love the light too. I have the light on a timer for around 7 hours. I
have noticed that both the fish and plants do better if I keep them together
just like in the outdoor pond. I also run a filter and air bubbler.