Tiny white surface leapers - what are they?
I have a mature tank, which I keep for the occasional breeding pairs. Recently I have noticed tiny white dots only on the surface. They are very small, perhaps 0.25-0.5mm, and they jump about 1cm over the water surface. In all my years keeping freshwater tropicals, I have never seen this before. Does anyone know what these might be, if they are harmful to the fish, and what causes them?
Thanks in anticipation.