The ecco series is different from the pro and/or classic series. The classics are the best for long-term reliability, the ecco series are designed to be more convenient but that doesn't mean they're a better filter. Also be aware that the eheims are all German, and they are rated differently than American filters as far as GPH
vs tank volume. FIne for a lightly stocked planted tank, but not nearly sufficient for a heavily stocked tank of cichlids or other larger fish.