Most of us are aware that most ATSs are sized on the number of feeds per day. However, I am sure the amount not just the number of feeds you feed must play a part in sizing an ATS. I have heard little discussion about the amount of feed as in bulk or weight and much more about the number of feeds when sizing a scrubber. An example of the above. Let's say I feed 1 whole cube of food twice a day that's 2 feeds of 1 cube per day, 2 cubes in total. Now if I feed 2 cubes twice a day that's still 2 feeds but twice as much food which in turn must create twice as much nuitrents. So the sizing of a scrubber to my mind must also take into consideration not just how much you are feeding but also the quantity. The other thing which is often ignored, and I can see why, is that some foods will contain more nutrients like nitrate than others. My current scrubber is undersized for the volume and the number of feeds I feed per day and is unable to keep up with nuitrent production hence why I am getting a new much larger ATS (an Atlantis 3 as Bud doesn't know when he will start production of his new Rev5 scrubbers) to deal with nuitrent production.