Congrats on the new tanks. Spawning bettas is well...unpredictable. Each betta is different, and you never really know whether or not if you'll get a successful spawn. Sometimes you'll get fry on your first try, others not for many, many, many tries. Some, you won't get any at all. Caring for the fry is tedious, yet fun! I'd say one risk is your pocketbook

You've got to super spoil the adults as well as your babies. Water quality is very important. You need to make sure you've got clean water at all times, and good ph levels for growth. If you're going to pair them together to spawn, especially for the first time, I'd keep a close watch on them. It's possible you could end up with a dead fish. And the females can just be just as mean as the males. I have a beautiful red "Romeo loverboy" that is sooooo gentle with the ladies. I put him with a female I hadn't paired him with before, released them, everything seemed fine for the first several hours, then came home from work that afternoon to find him totally nipped to shreds, the poor boy. And no fry to show for it. I am assuming she ate the eggs as she was thinner and he's such the Mr. Mom type...was so good with his last batch of babies. Sooo into recouperation he went, with lots of clean water, a good diet, and meds and although he's in good shape again, that boy will never look the same.

I had good mind to flush her I was so mad! But of course, I'd never ever do that, although the impulse arose for a good few seconds when I saw him. You need live food for your fry if you have a successful batch. I like walterworms and microworms myself. And you MUST care for the cultures or you're out of food...there's much to consider when deciding to take it on. Caring for fry can be just as challenging. Daily water changes (the method of doing this varies with age and size), frequent feedings, etc. take up a lot of time and effort. I have a wonderful link that covers all areas to consider before breeding, but I'm not sure I could provide it on this forum...I'm sure a more experienced forum member would know, and be able to provide the same link if it is allowed, as the site is rather popular. All in all, if you have OCD (

just kidding) then this is the hobby for you. And enjoying your new bettas seperately in their splendor while taking a month or two to decide what you want to do won't hurt. Learn as much as posssible before starting...that improves your chances. Good Luck! And welcome to the world of bettas. No fish hobby is complete without a betta!
do not disturb the egg nest...I just noticed what you said about removing eggs. You can allow the father to eat a few, if he is even going to do that, and cull the rest if you still feel you have too many. You'll notice, after doing some reading up on it, that culling is going to be something you'll need to do even after daddy eats some of the really bad ones, most likely. Does anyone know if I can post links on here? I think I have one that would help lottttttssss.....