Will School Fish Breed Unwantedly?

[Kinui]

Hi all. I recently came into possession of a 20 gal tank that I plan on setting up and cycling soon. I have a betta in a ten gallon that I plan to move and have been wanting to get some tankmates for awhile now. I was planning on 6 cory cats and possibly african dwarfs frogs or trying out tetras. My only concern with getting multiple fish of the same species is that I really don't want to deal with them breeding. I know a lot of people say just to remove the eggs or let them be eaten but that would just make me feel bad :\ . How likely is it that they'll breed without me actively trying to get them to? 
 
Thanks

 

[Baccus]

Corys may breed but if you dont intervene then the eggs will more than likely get eaten. The same for tetras. Honestly most species of the more commonly kept egg layers are not that easy to breed, so are good in community tanks. Livebearers on the other hand are just population explosions waiting for some water.

 

[frapadoodle]

Corys may breed but if you dont intervene then the eggs will more than likely get eaten. The same for tetras. Honestly most species of the more commonly kept egg layers are not that easy to breed, so are good in community tanks. Livebearers on the other hand are just population explosions waiting for some water.

Well put about the livebearers.
As with any creature, if it's fat and happy it'll get frisky. But unless you're an experienced breeder I wouldn't worry over it.

 

[the_lock_man]

The thing with any species, livebearer or egglaying, is that getting them to breed is fairly easy (with some notable exceptions), it's having the fry survive that's the hard part.
 
I had platies at one point when I first started, never even saw a fry, although the females regularly swelled and contracted, so the community was obviously getting a good lot of protein their diet. The tank was lightly planted, and I also had zebra danios, so it's no real surprise.