No they are active during the day and at night need to rest or sleep which they do and since they cant close their eyes they need the light off at night. I turn mine off around 9 and turn it back on at around 10 in the morning. They need a day and night cycle just like we do.
I don't believe so. My bettas (from what I can tell) go to sleep about the same time as me. I once was on the edge of falling asleep and I glanced at Maggie and she wasn't moving. I freaked out and turned on a light and she looked at me like "Why did you wake me up?"
Bettas are Diurnal, yes.
My the lights on my tanks who have them(a few don't)are usually on from when I get up in the morning, around 9-ish, until about 8-9 at night so about 11-12 hours, which is a tad long I know...all the algae tells me that xD. About 8-10 hours is, I think, a good amount of time to shoot for with the lights.
A few more questions arose this morning, my question is where is his erm.. the area where he release his wastes.. I have a male veiltail betta, and I saw poop stuck to the place between the first few strands of I guess his tail? and the second part... if that made sense.
Let me demonstrate with pitures (or try to):
|||| (poop) |||||| \\\\\\\\
The "|||" and "\\\" are his fins or tail or whatever they're called, the "___" represents the lower part of his body, where the fins start to come out.
I probably confused many of you guys haha, but anyways, I thought they're erm waste releasing area would be towards the end of his body? But I suppose it might make the tail dirty... not sure how betta anatomy thingy works.
And one more question, what does a healthy poop look like? His was light brown ish, kind of "bent" looking, kind of like stairs, and then curly towards the end. It would probably be as long as its fins if the poop was straight haha, anyways, is that healthy? I will change his water tomorrow haha, hopefully I can find the poop, since it's not stuck to his body anymore.
From what I can tell of your description(which is quite good!)that sounds perfectly normal. Yes, their little bottom is a little further up then you might expect, just behind their two little ventral, which are two long fins that come down under their pectoral(little side)fins, and right before their anal fin, witch is the big single long fin below their body. ;)
The poo sounds perfectly normal as well. It depends a little on what you feed, some different pellets and other foods can change the color a little, but generally so long as it is in the brownish/possibly slightly orangyish spectrum colorw-wise you're good. Sometimes they'll curl into balls, sometimes they'll only half curl, and sometimes you'll see little bits or maybe a smaller 'string'......but so long as its not whiteish and stringy, you're good. ;)