I have used the program in past. I used it for a 300 gallon aquarium. However, I also purchased live rock for that build so I can't tell you how well the program worked. I can say that I added ammonia day 1. Next day, no signs of ammonia. Added fish. Never saw a cycle. Had coraline growing on the back glass after about only a month. I added coral after 2 weeks. They all did well.