Ever since I added fish to my tank a year ago I have been running Nutrient Transport Mode after the last fish feeding in the evening. Works great and keeps the sand and landscape nice and clean. I run it for 2.5hrs so I reap the benefits of the complete cycle. I run 2.5hrs because if I am reading it correctly from the Ecotech documentation, a complete cycle takes 2.5hrs. I am confused when I read other post where fellow reefers are running Nutrient Transport to stir up detritus at a far less time. Some examples only running for a half hour which from what I understand would only be the first expanding pulse portion of the cycle. So my question is am I not understanding how the complete cycle works? Running 2 MP60's and 2 MP40's but only running the MP60's during Nutrient transport due to my MP40's are low in the tank and create to much sand disturbance.