My alage benny have MIA . My chromis strenght have reduce from 9 to 6. Seems like my high NO3 is starting to kill my fishes. Therefore i have decided to get two more seio to blow at the back of the tank, remove the rock in my sump and also clean the sump ( alot of detrius). Planning to get ROwa to reduce my high PO4 too. Waiting for bonus....