I'm raising guppies right now. About 60-80 of them. I had 4 guppies have babies. 20+ each. I feed them to my angels to grow them quick
Guppy fry are easy. They handle any tank. Warm or cold. They even survive in drinking cups if u give them new water daily. Hardiest fish I have ever owned.
I know they prefer water of ph7.0 or higher.
Water hardness has never been an issue for me with guppies, they seem to handle anything.
Feed them crushed up flake and keep the parents in a separate tank as they will start eating their young even when they are still popping fry out :O
Oh an try a water change every two days. Makes them grow a bit quicker.
You really can't go wrong with these guys. If there are any more questions feel free to ask