reds usually lay about 1500-2000 eggs at a time this is what i read in a book it was an old book but it still should be close to that
you will be able to tell real easly if there spawning i cant explain it very well but ill try
it like they get next to each other and kinda like vibrate on each other i know there is pics of it some where in this site but not sure where
but if your p's spawn you will know it also before they spawn the male will usualy will dig a burrow in the gravel like a nest and bite off leaves of plants and sh*t like that to make the nest then the male will try to chase the female over to the nesting ground to spawn
like i said i cant explain it very well but hope it helps somewhat
Piranha198220