S,
As a starting point, I'd go with 1,000 for your normal run RPM and then adjust the other speeds based upon what you want to do. As an example.. in order for my waterfall to look like I want it, I have to run my pump at 2700 rpm.. This is not a magical number, I had to experiment to find out what worked the best for me.
You will have to do the same thing. Experiment with different speeds and use the ones that work best for you. I initially had set up my pump to increase its speed several times a day with the idea that this would help with surface skimming. But I found that it made little or no difference, so I pretty much run at 1,200 rpm 95% of the time because it takes that speed to close my SWCG's flow switch.
Play with it... you can hurt it..
Thanks for posting,
Jim R.
- - - Updated - - -
I guess another point is don't try to make the return flow look like it did with your old single speed pump... running slow will not look right at first..