Hmmm....well one mp10 wouldnt be enough.
Designed especially for nano-reef aquariums, the MP10 from EcoTech Marine is a small yet powerful pump. The MP10 is ideal for tanks from 2.5 to 50 gallons tanks. Creates gentle flows of 200 to 1,575 gallons per hour, helping the tanks feel more like the ocean.
At least on the lower end...Marine depot has two with the battery back up for $740.
Mp 40 is $465 for one no back up...Either one would be really nice, I was just thinking it would be cool to have the alternating effect. but is it worth 300 for that and a back up battery?