Dr. Tim, I have had this tank set up for 2 months now. I used one and only to cycle it. I had a bacteria bloom after setting it up. I used waste away and it really cleared it up. However, it still had some cloudiness to it and certainly wasn't clear. I purchased some more waste away thinking it was still a little bit of a bacteria bloom left, and went ahead and did a full dose like I did the first time. This time it caused a bacteria bloom and/or at least made the water much much more cloudy that lasted 2 days. Now the tank is back to what it looked like before the 2nd round of waste away. Now i'm starting to wonder if what I have now is a bacteria bloom or not. I have enough for one more full dose of waste away (300gal system) I don't know if i should just do a 1/3rd dose once a week over then next 3 and give it time. I'm still going through a lot of Alk which we discussed in another thread is a sign of some heavy bacteria action going on. I drop .5 dkh per day right now. I have so little coral in the tank it can't be that, plus calcium and mag. have been within acceptable ranges the whole time. I know I have been over feeding, and now that the new fish are settled and I know what they are eating I can quite trying to throw the kitchen at them to see what their preferences are, I know that will help. I'm running 200 micron socks changing every other day, skimming 2005 hydor perfomer which is probably a little overkill right now on 300 gal system not really all that stocked yet. Also running Carbon, I have a dual reactor from BRS but haven't put GFO in it as I don't see/have any algae (I know bacteria will eat that too could be apart of the milky issue as well). I've been doing regular/frequent water changes but those really don't seem to make a difference. Sump is getting about 4x tank volume through it every hour. Don't know what other info would be of use. Here is a YouTube of the tank where even with the phone video you can see all the suspended stuff VID_20130423_104036_125 - YouTube Here is another video of the length of the tank to show the cloudiness https://www.youtube.com/watch?v=w8TXAFNA9aY What do you think I should try here? Is this the normal start-up fun stuff to just wait through on a tank? Should I try Clear-up since it does seem to be something large enough to see with the naked eye? Really appreciate all your help.