...You can only use them on a timer if the on-off period is 15 minutes or greater (ie. 15 on 15 off)....
I'm REALLY not a fan of Tunze pumps. I dont have nanostreams, but have had streams. I think the props are set way too far back, and as such, lead to too narrow of an output cone. Good maximods, or the Koralias, or even Vortechs dont seem to have this problem.
What wavemaker do you have?
You know Koralias and Seios cant be run on wavemakers either...(unless you buy the seio controller)