I decided to stop saving my guppy and platy babies and just let nature take its course. But suddenly babies have overtaken the tank. There’s so many I can’t count and they’re not even trying to hide. Just swimming around and the adults don’t seem to care. I don’t know what to do. Have had a couple of adult deaths recently, for no obvious reasons. Water quality parameters are all fine. Turned the heater up a little because it’s been cold here and wonder if that’s the reason for breeding frenzy and simultaneously higher mortality rate?