
I think the bowl is not too small for him
Breeders aren't going to risk a potential show winner & start of a new line to sub standard animal husbandry. They might bump that show winner up to a 2.5 or 5, they might double it to a gallon bowl.The tone started out fine. It escalated from there. OP seems to ignore anyone who isn't bothering them anyway. Which says to me that they are not looking to improve the conditions.
And breeders aren't bashed for that because you don't use those half gallon jars as permanent homes for the entire lifespan of a betta.
And really, what are the odds OP never opens their window, never puts AC or a fan on, or never gets sunlight in that room? Unless you're doing that on purpose like you do for breeding, the temperature in their bowl is going to be changing. This person is not a breeder and shouldn't be given advice like they are.
Looks like those odds are higher than you thought. So how much temperature change is acceptable? Still waiting for an answer on that one.I never open the windows or put ac on we mom and i are tropical people too we like it warm and thats the truth
Honestly though, the odds were low. Tropical members are an extreme rarity here. And people who never open a window are probably even more so. I'd dare to call them the 1% of this forum's members. There are plenty of people who come in and say "I don't need a heater! My betta hasn't died, so he's good!" and then it turns out they're living in Minnesota in the middle of winter or something equally ridiculous. It's reasonable for everyone to be skeptical here.Breeders aren't going to risk a potential show winner & start of a new line to sub standard animal husbandry. They might bump that show winner up to a 2.5 or 5, they might double it to a gallon bowl.
Looks like those odds are higher than you thought. So how much temperature change is acceptable? Still waiting for an answer on that one.
I'm telling the OP how they can apply what breeders do to their setup, as well as skill level. If I were giving advice like they were a breeder you'd be seeing links to gas fired space heaters, humidity control schemes, water change systems & so on. I'd be suggesting changing water in jars 2-3 times weekly, then conditioning the potential breeder in a 10 half full of water with minimal filtration, 80, maybe 82F.
If it were my setup & skill level the fish would go in a 2.5 on the end of a rack, silk plant & a couple small pieces of wood, large ugly blue sponge filter & heated to 80F.
Looking at what the OP has to work with, I'm drawing from all of these, and suggesting what may apply. I've known people to keep bettas long term in similar conditions who are not breeders. Keep it warm, keep it clean, learn as much as you can from others & apply as needed. The way breeders do things may not be for the individual, but you can draw ideas from it. The way I do things may not be either, once again, use what you can. Nobody here has an identical situation, you use what works best for you.
I find that mildly disturbing to think of a betta living 3-5 years in a whiskey bottle...even if the water quality is good. But my opinion on breeding conditions like that is a whole other thing I won't go into lol+1 Tolak.
If the temperature is truly tropical, there's no need for a heater. A lot of us forget that not everyone is at somewhere in the mid-30's latitude, including me - which is why my initial suggestion of a heater. But, not everyone has a 20-30 degree drop in temperature at night.
As time has gone on and I have pulled my information from a variety of sources, I've come to the conclusion that a small bowl is, in fact, just fine...as long as the water quality is good. Yes, many breeders do, in fact, keep their fish in half gallon jars for their entire lifetime, excluding when they are in the breeding tubs ... they just do water changes 3x a week. If you're intensely working a line and you're keeping 3 or 4 related families of fish, amounting to 20+ keepers just for breeding, not even counting show fish, having gallon or 2.5 gallon containers for every single fish is practically undoable due to space concerns. Heck, some fish farms in Thailand use whiskey bottles. The fish remain healthy. The key is water quality.
So in short, as long as the temperature is warm and stable, a bowl is most certainly fine. And, we should remember to be polite, be kind, and not assume that the OP is lying...because goodness gracious, that's just rude.