wanted to separate the thread running one right now about flow let me tell you theirs a lot of people in this forum with a lot of experience.:smile: my question is the tank is only two days old I used the same rock I had in my 75 used 25 gallons of the old water used the same sump didn't dean it out " had a bad experience once cleaning it " any ways my LFS guy told me to use some microbacter 7 since is a new system even though the rocks are two years old so I went ahead listening to experience and added the microbacter this morning 5 mll per 25 gallons as the instructions say when I got home tonight the water was cloudy in my experience every time I added extra beneficial bacteria without it needing it I would get a bacterial bloom is thats what's happening that the tank had enough beneficial bacteria with the rocks i introduced its about 100 pounds or more should i keep on adding or not