I have been using cheato in my system since i started, over a year ago now and i really feel that to newbie, cheato can be challanging. I have had zero nitrates and phosphates since i put the cheato in my tank and harvest a big bucket monthly. I think that sometimes it does too good of a job. It has only been until recently i have realized this and i am starting to play with running the skimmer less and less and trimming a lot more of the cheato so i have less mass to get the nutrients up. I have already been a heavy feeder because ive always had low nutrients and could never figure out why. I never have any algae in the main display, only small cyano patches here and there of which i don't understand. I think at the end of the test they are going to find out just how good of a job this stuff does and even maybe too good of a job.