So I've got my male betta in a small aquarium (I think it's a 2.5 gallon, but I'm not sure since we've had it a while). I'm wondering if I need a light for it. Throughout the day I open the window blinds a bit so it's a little brighter, and in the evening I turn on a lamp so it's not completely dark. But do I need to get an actual aquarium light?
Also, later this year I'm planning on setting up a 10 gallon to house a sorority. I've already got the tank; it's been sitting in the basement unused for several years. When I'm ready to get my fish, do I need cycle it? If I do, a step-by-step would be nice since I really have no idea how.
Thanks in advance!