correct flow


New member
on the 2 sides of my tank (200gal) i have two Tunze 6105 pumps and on the midle one 6065 and one korallia 2. last monday one of the 6105 stopped working and I have noticed that all fish (18 total the 8 being tangs) looked more happy , moving around and playing better than when all pumps were working? Is my circulation too much? What is the best way to calculate the correct flow?