My goal with guppies is to try to get fish from all over, then breed them. Their fry, theoretically, should be much hardier than the parents.
And as for hardy, here's a story for you:
My brother studied biology last year, making a "sustainable" ecosystem. Basically, they put some guppies in a half of a bottle with some gravel and duckweed. The ammonia, I was guessing, would kill most of the fish.
As I was showing interest in guppies, he got a bottle that a different student didn't want and brought it home. Apparently she was with a male, but he had died.
She dropped in the car.
So, now I have a female guppy and 4 fry.
I'm pretty sure she's hardy, when I tested the ammonia in the bottle water it was 0.5-1.0.
She is a feeder guppy. But my brother said she was previously kept with some fish that looked like endlers. 5 think that she may have some endler in her, because she has a very light orange spot by her gills.
I think that if I breed her with fancy guppies, the fry will be fairly tough because of their genetic diversity.
Any comments?