We have set up a 75 gal. Kip used 2 pumps in sump - a 475 and a 740. The overflow box he got has 2 acrylic "u tubes" and he can keep the suction in one but the other continues to get a bubble and then decreases til it is pulling just a fraction of the water. We have put the Coralife wavemakers in this tank and I don't know if that is a problem. They can be set several different ways and we have played with that but no impact on the suction of the second tube.
Any input would be appreciated. Jody
Any input would be appreciated. Jody