This Saturday the fry will be 3 weeks old. I can see a real difference in size from when thy were first hatched. You can see the red insides and full bellies on all of them, there are 3 or 4 that are starting to get a dorsal fin, it's so tiny and clear you can barely see it.
I added enough water today to connect the filter. I was worried at first when I turned on the filter because there was so much movement in the water the fry were having trouble swimming. I tried a few things then I realized the filter has a valve on it where you can turn down the pressure. Now it's filtering out all the bad stuff and the fry are swimming happily. I think I am going to change the sponge on the filter to a thicker one just to help a little more with the water pressure. so far they are not getting stuck to the sponge so I think I have the right amount of pressure for them.
I have about 8 gallons of water in the tank now and they seem to be able to swim to the top for more air without problem. I will take some pics soon if I can get one of the developing dorsal fin.