Hello, I have recently added 5 neon tetras to my 10 gallon tank. Sometimes they swim around like normal fish but other times I see them "scaling" the glass. They will basically put their heads to the glass and swim up and down. I don't know if this is because they see their reflections and want to swim though the glass lol. All of them physically are good. I see no signs of damage on any of them. It seems like when they are swimming normally they see their reflections and try to school with them. Any help would be appreciated. * Sorry for posting so many threads. I am getting many different problems at many different times.