After losing almost all of my zebrafish fry, I finally got the idea to set up a small separate tank for them. I was down to just two fry at this point. I got a 1-gallon ‘MiniBow’ tank that had an undergravel filter, and set it up.
I put the zebrafish fry in it, and also dropped in a single Physa snail (aka pond snail aka bladder snail) and a single trumpet snail, and put in some leaves that had come off a plant in another tank.
Within a week, one of the two fry simply vanished – leaving just a solitary survivor. I have named him Les because he is a survivor.
He’s growing quite slowly, because unfortunately the tank is unheated. I may have to fix that as it gets colder with the changing seasons. So he’s just over 1/2 inch long, but he’s a perfect copy of the adults, just in miniature.
Meanwhile the physa and trumpet snails have both been reproducing; there are lots of baby physas crawling around, and I’ve seen a few baby trumpets lurking around the gravel.