No. I figure I disrupted the system big time over the last couple of months. Removed all the rock to re-aquascape, removed part of the old sand bed, added new live rock... Also it ran without a sump or skimming for a couple of weeks when I ripped out the old fish room. When I brought the new sump on it added 180 gal of new salt water. Thats a lot of change. Lets see how the new skimmer does with it.