What is the difference between the 6000 and 6055?

[Black Mammoth]

I bought a 6060 2+ years ago. Since then I went from a 75g to a 90g and added a lot of rock. I'm finding that I probably could use another Tunze. I'm thinking about adding a controllable unit...maybe even 2 and use the 6060 in another tank. Anyway, I was shocked to see how things have changed a bit in the Tunze lines and now I'm a bit confused. All I've been finding are the 6025,45,55 Nano-Streams. I guess these replaced the 6060,80, etc. I noticed that Roger was having a sale for the 6000. How does this differ from the 6055? The specs are similar, but the 6055 is cheaper. So what else am I missing?

I guess that I'm back to being a noob

 

[rvitko]

6055 is a nano stream it is smaller, about the size of a raquetball. The flow spread is not as wide as a 6000. The 6060 and 6080 are still made. The 6000 and 6100 were replaced by the 6101, which can function as either pump by changing a jumper.