They grow up to about 5" and are peacefull unless you put 2 together, they are are an ideal algae eater for the small to medium community tank, I am not sure if they will eat fry but I know that the male actually looks after its own fry. The only thing that this fish needs is a piece of bogwood for refuge. Hope this info helps
Oh well. You could just get some otos, though I know someone said in this post earlier that an oto once ate a fish egg, but maybe you should just get some more albino cories. Though I'm going to get four pigmy cories, they're really sweet, but I don't know if they will eat fry. You still have a lot of options. Good luck!