Do cold water fish need light?

Cold water fish do need light, but they do not need as much light as tropical fish. In general, cold water fish need about 10-12 hours of light per day. This light can come from natural sources, such as sunlight, or from artificial sources, such as aquarium lights.

It is important to note that cold water fish can be stressed by too much light. If you are using artificial lights, be sure to turn them off at night to give the fish a chance to rest.

When choosing an aquarium light for cold water fish, it is important to select one that emits light in the correct spectrum. Cold water fish typically prefer light in the blue and green spectrum.

Here are some additional tips for lighting an aquarium for cold water fish:

* Place the aquarium in a location where it will receive natural sunlight for part of the day.

* If you are using artificial lights, be sure to choose a light that is specifically designed for aquariums.

* Turn the lights off at night to give the fish a chance to rest.

* Avoid using lights that emit light in the red spectrum, as this can stress cold water fish.