Klaus,
Hope you are well? I am about to setup a large reef aquarium (3000litres) and will have a closed loop system, I am looking for two pumps to drive this, initially i was thinking Deltec HLP pumps but then i learned of your Red Devil II Titanium pumps, these caught my eye due to the flow and external controller. I then learned of the recently launched Blue Eco range. What are the advantages of this range over the RD range control wise ansd i also read you were developing Ocean Simulator software? Aplogies on assuming blue eco is one of your products if it is not!