You need to have a functional filter in any tank where you keep fish. Even fry produce some ammonia so you need to process that. I use filter sponge to cover the inlet of my fry filters. Just a slit in the end of the sponge and push it up over the tubing like this.
This is what it looks like in place after about a month.
Congrats on your fry.
I currently have Platy & Guppy fry, hard work, but they're fun to watch.
At 3/4 weeks old their personalities are beginning to show
Thank you old man. I did get one yesterday and it works well. I love to watch them grow they will be a week on Saturday and I can already see them growing. They are fun to watch!!!!