Usually once I see them chasing (which may go for a couple of hours), I stop feeding for the next couple of days. I will see the fish rooting around in the anacharis and water hyacinths a lot after a spawning. I am guessing they are finding the eggs. 
The female doesn't actually get pregnant. She is at her fattest pre-spawn. The males chase her so they can fertilize the eggs as they are being expelled from the females body. Once all the chasing is over you can assume she is empty and all the eggs are out and about.
Mentally is another thing then>>
Good to know , I was wondering about thar, thanks Sissy!
I have been not feeding our fish, but with all the storms rolling through, all the rain water changes, they have been spawning non stop. I have never had so many fry as I do this year. I do have water room for them so all will be fine. And they are so pretty! Little monsters.............
I'm actually thinking guppies. only male guppies thought. I put those in the pond during summer at my old house without ill effect, go back to my indoor tank in fall, winter, and spring. they are very interesting in the pond and eat the babies and mosquitoes larvae that my big goldfish missed. especially now I have plants ring, the place where little tiny creatures can live undetected!