I ended up adding some neons to my tank. I started with 6 yesterday this morning I could only find 5. An hour later I was down to 4. I started looking for the missing two and spent about an hour looking through the plants. Took a break and started looking again. Looked at my aquaclear hob and initially didn't see anything. Finally decided to take the filter apart and low and behold in the media carriage I find two neons swimming around. They happily joined the other four. I will be adding 6 more in a few weeks. The neons were pretty small but I didn't think they were small enough to fit through the intake.
I am off to buy a prefilter.
i had to do the same thing! my ghost shrimp were in with my bio blocks.. it was really hard to pick up each bio block without squishing the shrimp!