Last night I noticed one of my neon's looked very plump and was swimming strangely like she/he was doing a little dance. I expected to find a dead neon this morning. However, all neons are back to normal size and swimming around normally. There are however some deposits on the floor of my tank that weren't there yesterday and look like tiny shards of opaque glass.. I've attached a pic. Do you think my neon could have laid eggs? They are scattered all over the tank.