I have a 90 and dumped my 2 K3's for 2 Tunze 6100s. Honestly they stick out about the same as a Koralia, but it's not even fair to compare the flow (like comparing a Ferrari to a Taurus, they're not even in the same league). I have one cranked down as low as it goes, and the other pulsing from a controller.
I can see the water level on the left side of the tank surge up and down with the pulses of the pump from the right side.
