The reason I ask of this is because when I had my tank as an agessive tank I never had a problem with my water. or never got any cyno in my tank, since I went to reef and took out the bio balls I have had all sorts of problems, cyno,cloudy/dusty water, today I had to emptie out my tank completly, one of my pvc pipes which I didnt do correctly to begin with started to leak, I had to empty out the tankso I decided to go back to my old wet/dry with the bioballs, now my only problem is that my euro-reef doesnt fit in it with the mag12 return pump, so now I am skimmerles I am wondering if I am going to have a problem?