I had up to 30 fry at one point and know half of them are dead
* now
They are in a container pond with lots of plants. At one point I had about up to 30 medaka fry hatched. Now I count around 15 maybe two weeks later. No adult medaka because I wanted to hatch them all at the same time in a pond. Is this the normal survival rate? I live in the SF bay area so morning temps can get a bit cold around 57F. But I notice the temps are usually consistent at around 65F. I wonder if I should have kept a heater in the pond. No nymphs that I can see but a lot tiny snails. I fed it once a day, but I figured the fry would be able to find food on their own. What do you think?