I also purchased a Prizm unit before I knew better. The guy at Als said it would be excellent (whatever!). It took some fiddling but I finally got it to a flow rate that seems to work for my tank (thanks Chad). I marked it with a line so I could reset it after cleaning.
The main problem I have is it occasionally loses it's syphon and I get nothing at all!
I intend to upgrade to a new unit eventually. IF there is a modification, however that would let me run it at full flow - I am interested!
Companion in misery:
