[nycman]

Since you already have an Apex, consider Neptune WAV pumps. I recently replaced three MP40s with four WAVs. The WAVs are plug and play compatible with the Apex and are programmable, plus have features that the Ecotech MPs do not. The big "advantage" of the Ecotech MPs is the wet side/dry side avoidance of a cord inside the tank. However, the WAVs can be swifled to a 45% angle, which is not possible with the MPs. My MP40s were mounted on the sides of my tank (as recommended) but with the angling, I can mount all of my WAVs on the back wall. This in my mind, neutralizes the cord management issue with the WAVs versus Ecotech MPs. With them mounted on the back wall - I see little or no cord on the WAVs, but with the Ecotech MPs mounted on the side, you see lots of cord, even if not inside the tank.