I was looking to but the koralia evo 1400 and just had a question. What is the difference in these two pumps? Why does one cost a lot more than the other? Thanks.
http://www.amazon.com/Hydor-Koralia-Evolution-Aquarium-Circulation/dp/B0036S1ETY
http://www.amazon.com/Koralia-Evolution-1400gph-Aquarium-Circulation/dp/B0042GDGQ8
http://www.amazon.com/Hydor-Koralia-Evolution-Aquarium-Circulation/dp/B0036S1ETY
http://www.amazon.com/Koralia-Evolution-1400gph-Aquarium-Circulation/dp/B0042GDGQ8