Okay well here's another question. Is it enough for a 5g betta only tank if it's turned all the way down?
I actually saw that thread, but it seems like so much more of a difference from all the way down to all the way up. But then again I don't know much about water pressure...According to another forum, they had to contact hagen to get the gph...for a S10, it was 47.5 to 55gph. If you want to see it for yourself, google marina slim s10 gph. They had a lot of other information about the slim series too.