I have Betta FEVER. Seriously. I can't get enough of them. ;3
At one point... like 3 years ago... I had 100+ Bettas at once! 80 of those were juveniles from one spawn. The line is still going on today, not with me, but with the people I sold/gave them to. One of the boys won a show in Texas. Since then, I've had a few smaller spawns. I did an F2, an F3 (in which all but one died of velvet), and a couple of Plakat spawns.
I have been taking a break from spawning for a while but I have a metallic Plakat boy, Falkor, who placed second in a show in September. He's such a sassy little guy. I'm currently trying to find the perfect girlfriend for him. At the same show I bought a purple/yellow HM, Liberace, and a yellow/white HM Plakat, Meringue. I also have a cellophane Plakat girl, Nilla, who is from my spawn 3 years ago.
Setup (the only difference now is that the entire surface is covered in duckweed... entire... surface.)
Liberace
A few weeks after I got him (he had finrot... his owner moved to Thailand and left his Bettas. his tail was jagged and bloody when I got him.):
His tail continues to grow out! It's much longer than this, even.
Givin me lip.
Meringue. He is very camera shy.
Falkor. <3333
Lil' Nilla.
How often do you clean the tank? do you take all the water out?
Some people have them under plants.. is that ideal?
I cant beleive they jump out! crazy lil bettas!
Unless you have a filter, a tank of 10 gallons+, and you read up on cycling a tank, you should be doing roughly 100% water changes weekly. I despise cycling, so I do lots and lots of water changes instead. Water quality is very important. It's best to treat water with a combo of Amquel & Novaqua and allow it to age in a covered contained for at least 24 hours. I highly recommend adding a dash (1 teaspoon per 5 gallons) of aquarium salt to prevent diseases, and either buying Indian Almond Leaves (available online) or Indian Almond Leaf Extract (available at fish stores). It replicates the natural, "black water" conditions that Bettas come from.
The percentages are up to you. You can change 10% a day, you can change 50% twice weekly, or you can do the full 100% one day a week. When I have my juvies in 1 gallon "jars", I change the water 100% twice per week. It's an awesome idea to also syphon out any uneaten food or waste at the bottom of the tank as often as possible (all you need is some airline tubing attached to a piece of stiff airline tubing, and gravity), especially if your tank is small. That stuff decomposing in the water is producing the ammonia that causes finrot and many illnesses.
Bettas are carnivores, and should never, ever be expected to eat a plant on top of a vase. Live plants are great for tank decor, and they produce lots of oxygen and absorb bad stuff, but they aren't a food source and shouldn't be blocking a Betta's access to air. The best food for a Betta is fresh, frozen bloodworms and brine shrimp (available at pet stores)... if you can't do that, look for a premium tropical fish food that comes in small pellets (Hikari has good stuff).
Once, I had this enormous, 40 gallon grow-out tank for some of my young females (40 females!). It was on the floor and I left the top off by accident one night. I woke up, looked in, and I knew something was amiss. The surface of the water was a good 6-10" from the top. It was pretty much impossible to count them but I just knew all of them. I looked everywhere... behind my desk, under my bed, everywhere! Finally I decided to peek behind the tank itself and I discovered one of my favorite girls all dried up and covered in dog hair on the carpet.
I was distraught, but I put her in a jar of water first to be sure. When I came back in several minutes later she was wiggling around waiting for breakfast. Bizarre!!!!! She jumped a good foot, was drying out on the carpet for who knows how long, and made it through that unphased.