So I have more than a dozen just hatched yesterday, peppered corydora fry in a 2.5 gallon with a home made sponge filter thingy and the water is about half full. I was just sitting here, looking into the tank when I noticed these tiny almost microscopic white things fluttering about the tank walls, in the water. What could they be? I am using a sponge that was in an established tank, squeezed it into the fry tank for the micro something or others for them to eat when the yolk sacs are gone. I noticed that really made the water cloudy so I siphoned out about half of that and replaced it with water from the community tank, where they were laid. The sponge just has an air stone inside of it, with a small air pump and its just below the water surface and there is sand over the bottom, probably too much, but some will get sucked up when I start cleaning the tank after they start to eat. Any ideas would be greatly appreciated. I am sure I could try and squish them, though they seem to move pretty fast (not the fry, the things) or I could remove the fry and start with new tank water from the big tank... Please help, I don't know what I should do... Oh I also have 2 very small pieces of anacharis floating in there too...